DIY：怎样修复一个不能复制也不能看的MP4文件

我在前天录了13分钟的闪电和雷鸣，但是录像机和Windows 10都不能读这个录好的MP4文件，这个文件有5.8 GB, Windows 10 显示出文件的存在，但是不能从micro SD盘里下载到Windows 10里，也不能保存在外接硬盘里。error code是0x80070570。因为我知道里面有闪电和雷鸣，所以不甘心丢掉这个文件。所以昨天用了4-5小时在Gemini的指导下把文件改成了录像机和Windows10都能读的文件。

主要步骤：

1. Sony录像机FDR-AX53里有修复文件的功能。把SD卡放进Sony录像机里，menu->setup->repair img. DB f., 这部程序是Sony做的，但是还是读不出图像。
2. 从 github (free)里用下载的软件untrunc, make a reference file (10 second long) to compare with the faulty file. 这个步骤也没有解决问题。（所以这个步骤没有必要）
3. 用Windows 10 command prompt (run as administrator), cmd prompt->chkdsk E: /.(注：E:是含有MP4的卡)。结果chkdsk把5.8 GB的MP4文件变成了可以复制但是还是不能用Windows10看的440 MB的MP4文件，最可气的是我丢掉了76%的录像！(Windows 10 里这个chkdsk(DOS 时代的)功能也是无能为力的功能，还把我的录像砍掉了大部分)
4. 用TestDisk/PhotoRec（free）， a command prompt 软件->用箭头把含有MP4的卡highlight->File option->S, 然后这个软件用了一个多钟头找出了169个被“弄错”或删掉的文件。我的那个MP4又从440 MB恢复到了5.8 GB，最重要的是用这个MP4文件我可以看到我录的闪电而且也能够从SD卡复制到硬盘上了。（这是一个极好的免费的软件，虽然费时间，但是一个钟头里找出来169个文件，总量23.7 GB。当然只有一个文件MP4是我需要的）

 

这个是用修复后的MP4作成的视频：https://blog.wenxuecity.com/myblog/40376/202603/10323.html

 

下面是昨天我与Gemini的对话。（因为比较长，我没有用deepseek把它翻译成中文，有兴趣的人可以copy 与paste到deepseek的对话里，它可以翻译）

 

 

You said

yesterday I used sony hdr-ax53 to record lightnings and got 6 gb of mp4 file. but the sony and my win10 would not recognize the file. error code is 0x80070570. what can I do? can I have some software to correct the error so that I could read my lightning file which is fatastic?

Gemini said

Capturing lightning is a game of patience, so I can only imagine how frustrating it is to have a "fantastic" 6 GB shot locked behind an error code!

The error 0x80070570 ("The file or directory is corrupted and unreadable") usually means the file system index on your SD card or hard drive is broken, likely because the camera didn't "close" the MP4 container properly (which can happen if it was still writing that huge 6 GB file when it lost power or the card was pulled).

Here is a step-by-step guide to rescuing your lightning footage, starting from the safest and easiest methods.

1. The "Camera Repair" Trick (Safest)

Sony camcorders have a built-in tool to fix their own database errors.

1. Put the SD card back into your FDR-AX53.
2. Go to Menu > Setup > Media Settings.
3. Look for Repair Img. DB F. (Repair Image Database File).
4. Run it. The camera will scan for "orphaned" video data and try to wrap it into a playable MP4.

2. Windows "Check Disk" (Fixing the Drive)

If the camera doesn't see it, Windows might just need to fix the "table of contents" for the drive.

1. Plug your SD card into your Win10 PC.
2. Open Command Prompt as an Administrator (search cmd in the Start menu, right-click, and select "Run as administrator").
3. Type the following command and press Enter (replace E: with your SD card's actual drive letter): chkdsk E: /f
4. This will attempt to fix the file system errors that are triggering that 0x80070570 code.

3. Use "Untrunc" or "Shutter Encoder" (Recommended Software)

If you can see the file but it won't play, the "headers" (the instructions that tell a player how to read the video) are missing.

• Untrunc (Free/Open Source): This is the gold standard for your specific issue. It takes a "healthy" file from the same camera (a short, working clip you shot) and uses its "DNA" to repair the broken 6 GB file.
• Shutter Encoder (Free): Use the "Rewrap" or "Change Console" functions. It’s a powerful tool that can often rebuild an MP4 container without needing to re-encode the whole video.

4. The VLC "Fix-on-the-Fly"

Sometimes VLC can bypass the corruption:

1. Open VLC Media Player.
2. Go to Tools > Preferences > Input / Codecs.
3. Under "Files," find Damaged or incomplete AVI file and change it to Always fix.
4. (Note: Even though yours is an MP4, try renaming the file extension to .avi and opening it. VLC's repair engine is sometimes more aggressive with AVI headers).

Important Note: Do not record anything new on that SD card until you have recovered this file. Writing new data could overwrite the "ghost" data of your lightning strike.

Would you like me to walk you through how to use Untrunc specifically, or do you need help identifying which drive letter your SD card is using?

You said

I went to sony ax53 and clicked on repair img. d8 f. I was asked to"do you want to check the image database file? the choice is ok or cancel. which one i should chose?

Gemini said

You should choose OK.

Since you are seeing that prompt, your camera has detected that the "map" it uses to find and play videos on your SD card is inconsistent. Clicking OK tells the camera to scan the card, find the 6 GB of data belonging to your lightning footage, and re-register it so the camera (and eventually your computer) can "see" it as a valid file again.

What happens next?

• Progress Bar: The camera will show a "Repairing..." or "Processing..." screen. Because your file is large (6 GB), this might take a few minutes.
• Battery Safety: Make sure your camera has enough battery or is plugged into a power outlet. Do not turn the camera off or pull the SD card out while it is repairing.
• The Result: Once it finishes, try to play the video back on the camera's LCD screen. If it plays there, you have successfully bypassed the "0x80070570" error, and your computer should be able to read it normally now.

If it says "No images found" after the repair:

Don't panic! This sometimes happens if the file header is too badly damaged for the camera to understand. If that occurs, we will move to the Step 3 (Untrunc) method I mentioned earlier, which uses a computer to manually rebuild the file.

Go ahead and click OK—would you like me to stay on standby while the camera runs the repair?

You said

they said the repair is finished, but I use sony ax53 to play the file, the sony still say data error.

Gemini said

That is disappointing, but it's a common "Stage 2" problem. When the Sony says "Data Error" after a repair, it means the camera fixed the "map" (the database) so it knows the file exists, but the video header inside that specific 6 GB file is still corrupted or empty.

Think of it like a book where the Table of Contents now says the chapter is there, but when you turn to the page, the ink is scrambled.

Since the camera can't handle the internal repair, we need to use a PC to "transplant" a working header from a good file into your lightning file.

The Best Fix: "Untrunc" (Free)

This is the most successful tool for Sony MP4 errors. It compares your broken 6 GB file to a "reference file" (a short, working video from the same camera) to fix the structure.

1. Record a "Reference File": Take your Sony AX53 and record a quick 10-second video of anything. It just needs to be the same resolution and frame rate as the lightning video.
2. Download Untrunc: Search for "Untrunc GUI" (the version with a visual interface is much easier than the command-line one).
3. Run the Repair:
   • Open Untrunc.
   • Select the "Reference File" (the 10-second good clip).
   • Select the "Truncated File" (your 6 GB lightning clip).
   • Click Repair.

The "Quick & Dirty" Fix: Shutter Encoder

If you don't want to mess with reference files yet, try this:

1. Download Shutter Encoder (Free).
2. Drag your 6 GB file into the list.
3. Under "Choose function," select Rewrap.
4. Change the "Extension" on the right to .mp4.
5. Click Start function.
   • This will try to strip the broken container and put the raw video data into a brand-new, healthy MP4 shell.

One Last Check

Before you do anything else, copy that 6 GB file from the SD card onto your computer's hard drive. Working directly on the SD card can sometimes cause more errors if the card itself is failing.

Would you like me to help you find the download link for Untrunc or explain how to use the Command Prompt version if you're comfortable with that?

You said

the reference mp4, must it be exactly 10 seconds?

Gemini said

No, it doesn’t have to be exactly 10 seconds!

The length of the video doesn't matter as much as the settings. The reference file is used as a "blueprint" to tell the repair software how the video and audio data should be structured.

For the best chance of success, the reference file just needs to match these three things from your original lightning video:

• Resolution (e.g., 4K vs. 1080p)
• Frame Rate (e.g., 24fps, 30fps, or 60fps)
• Recording Format (e.g., XAVC S 4K vs. AVCHD)

Tips for your Reference File:

• 30 seconds is plenty: Anything from 10 seconds to a minute is fine. It just needs enough data for the software to read the "header" information.
• Don't change settings: Use the exact same camera settings you used for the lightning. If you aren't sure what they were, just leave the camera on the settings it's currently on (assuming you haven't changed them since yesterday).
• Use the same SD card: Ideally, record it onto the same card (or at least the same brand/model of card) to keep the data structure identical.

Where to get Untrunc:

Since you are on Windows 10, I recommend the Untrunc-GUI version. It’s much friendlier than the command-line version. You can find it on GitHub (it is a well-known, safe open-source tool).

1. Put your 6 GB "broken" file and your new "good" file into a folder on your computer's Desktop.
2. Open Untrunc.
3. Select the good file first.
4. Select the broken 6 GB file second.
5. Click Repair.

It will create a new file (usually ending in _fixed.mp4). Since your file is 6 GB, this might take about 5–10 minutes to process.

Would you like me to help you verify the resolution or frame rate of your files before you start the repair?

You said

I entered github, but what should I do next?

Gemini said

GitHub can be a bit confusing if you aren't a developer, because it's mostly a place for code. You want the "Releases" section where the ready-to-use program is kept.

Follow these exact steps to get the Windows version of Untrunc:

1. Go to the Download Page

Open this link (it takes you directly to the "Latest" release of the most popular version): https://github.com/anthwlock/untrunc/releases/tag/latest

2. Download the File

• Scroll down to the bottom of that page to the section called "Assets".
• Click on the file named: untrunc_x64.zip (it should be about 15–20 MB).

3. Extract the Folder

• Once it downloads, go to your Downloads folder.
• Right-click untrunc_x64.zip and select "Extract All...", then click Extract.
• Open the new folder that appears.

4. Run the Program

• Inside that folder, look for untrunc-gui.exe.
• Double-click it. (Windows might show a blue "Windows protected your PC" popup. If it does, click "More info" and then click "Run anyway").

5. How to Fix Your Lightning File

Now that the program is open:

1. Reference File: Click the first "Select" button and choose your 10-second "good" clip you just recorded with the Sony.
2. Truncated File: Click the second "Select" button and choose your 6 GB lightning file.
3. Repair: Click the Repair button.
   • Note: Since your file is 6 GB, the program might look like it's "not responding" for a few minutes. This is normal—it is processing a lot of data. Let it finish!
4. Check: When it's done, look in the folder where your lightning file was. You should see a new file with _fixed in the name. Try playing that one!

If it gives you an error immediately after clicking Repair: Go to the "Settings" tab inside the program and check the box that says "skip unknown (-s)", then go back to the Repair tab and try again.

Let me know if you get stuck on any of those steps!

You said

after running, I got this message. what should I do

•  

Gemini said

This error confirms that the problem isn't just a "broken video header"—Windows literally cannot read the data on the SD card where the file is sitting. It’s like trying to read a book, but the pages are glued together.

You must move the file off the SD card before Untrunc can fix it.

Here is exactly what to do next:

1. Copy the file to your Desktop

Do not try to run the repair software while the file is still on the Sony SD card.

1. Open your SD card in File Explorer.
2. Find the file C0014.MP4.
3. Right-click it and select Copy.
4. Go to your Desktop, right-click in an empty space, and select Paste.

If Windows gives you the same "Corrupt and Unreadable" error during the copy: You must run the Chkdsk utility as the error message suggested. This will "un-stick" the file so Windows can read it.

2. How to run Chkdsk (The "Un-sticker")

1. Keep the SD card plugged into your PC.
2. Note the Drive Letter (e.g., D:, E:, or F:).
3. Click the Start button and type cmd.
4. Right-click Command Prompt and choose Run as Administrator.
5. Type this command and press Enter (Replace E: with your card's letter): chkdsk E: /f
6. If it asks "Would you like to force a dismount?", type Y and press Enter.
7. Once it finishes, try Step 1 (Copying to Desktop) again.

3. Run Untrunc again

Once the 6 GB file is safely on your Desktop/C: Drive:

1. Open Untrunc-GUI again.
2. For the "Reference File," select your good 10-second clip.
3. For the "Truncated File," select the 6 GB copy on your Desktop (not the one on the SD card).
4. Click Repair.

Why this is happening: The 0x80070570 error means the SD card's "file system" is confused. Running the repair on the SD card is like trying to fix a car while it's still driving. Moving the file to your hard drive first gives the software a stable environment to work in.

Did the file copy successfully to your Desktop, or did Windows block the copy with an error?

You said

I got this message again. I could not copy it to desktop.

•  

Gemini said

This confirms that the "lock" is on the SD card itself. Windows sees the file, but because the file system is corrupted, it refuses to move the data blocks.

We need to use the Command Prompt to force Windows to fix the SD card's index. This is a very common fix for cameras that cut out during a recording.

Step 1: Find your SD Card Letter

1. Open This PC (File Explorer).
2. Look at your SD card. Note the letter in parentheses, like (D:), (E:), or (G:).

Step 2: Run the Repair Command

1. Click the Start button and type cmd.
2. Right-click on "Command Prompt" and select Run as Administrator. (This is important!)
3. In the black window, type the following exactly (Replace E: with your actual SD card letter): chkdsk E: /f
4. Press Enter.

Note: If it asks: "Chkdsk cannot run because the volume is in use by another process. Would you like to force a dismount?" type Y and press Enter.

Step 3: Copy to Desktop again

Once the process finishes (it will say "Windows has made corrections to the file system"), go back to your SD card in File Explorer.

1. Try to Copy the C0014.MP4 file again.
2. Paste it onto your Desktop.

What if Chkdsk fails?

If chkdsk says it cannot fix the error, your SD card might have a physical hardware issue. In that case, we will use a tool called Recuva or PhotoRec. These tools don't ask the "faulty" Windows index for permission; they scan the raw surface of the SD card to find the video data directly.

Try the chkdsk command first—did it finish successfully or did it give you an error message?

You said

I tried chkdsk, the 6 gb file became 400 mb file, can be copied to desktop. but it still could not be read by media player etc software

•  

Gemini said

I have some bad news, but also a potential "hail mary" play we can try.

Looking at your chkdsk screenshot, the utility found "Cross-linked" files. When Windows "made corrections," it realized that the 6 GB of data didn't actually have a valid "home" in the file table. To "fix" the error, it essentially chopped off the parts it didn't understand, which is why your file shrank from 6 GB down to 440 MB.

Essentially, Windows threw away 5.5 GB of your lightning footage to make the SD card "healthy" again.

Can we still get the 6 GB back?

Because the file is now 440 MB, Untrunc won't work yet because the data it needs to fix is gone. We need to go "behind the back" of Windows and search for the raw data that was deleted/lost during that chkdsk repair.

Do not record anything else on that SD card. ### The Last Resort: PhotoRec (Free & Powerful) Since Windows "cleaned up" the file system by removing the data, we need a tool that ignores the file system and looks at the raw bits on the card.

1. Download TestDisk/PhotoRec: Download here (Get the Windows 64-bit version).
2. Run photorec_win.exe: It looks like an old-school DOS window.
3. Select your SD Card: Use the arrow keys to find your Sony SD card and press Enter.
4. File Opt: This is important. Press S to unselect everything, then find mov (which covers MP4) and press the spacebar to select it.
5. Search: Select the partition and choose [Whole] and [Free] (or Whole if Free doesn't work).
6. Destination: Choose a folder on your Computer's Hard Drive (not the SD card!) to save whatever it finds.

Why this might work:

PhotoRec will scan the entire SD card for anything that "looks" like a video. It will likely find several files. One of them might be a huge file (the full 5.5–6 GB). If it finds that large file, it will likely still be "broken," but that is the file we can then put into Untrunc to finally see your lightning.

Would you like me to guide you through the PhotoRec settings once you have it open?

You said

I typed s and the program disappears, how do I select S?

Gemini said

It sounds like you might have accidentally hit a key that closed the window or the program crashed. PhotoRec uses a text-based interface, so it can be a little finicky with keyboard inputs.

Let's try again with a steady hand. Here is exactly how to navigate that menu without it closing:

1. Re-open the Program

Go back to your folder and right-click photorec_win.exe, then select Run as Administrator.

2. Select the Drive

• Use the Up/Down arrow keys to highlight your Sony SD card.
• Press Enter (to Proceed).

3. The "File Opt" Step (Where 'S' is)

• Look at the bottom of the screen. You should see [Search] [Options] [File Opt] [Quit].
• Use the Left/Right arrow keys to highlight [File Opt] and press Enter.
• Now, to handle the 'S' part: * Press 's' (lowercase is fine) just once. This "unchecks" every file type in the list.
  • Now, use the Down arrow to scroll through the alphabetical list. Look for mov (Sony uses this for MP4 headers).
  • When you find mov, press the Spacebar to put an [X] next to it.
  • Press 'b' to save these settings.

4. Start the Search

• Press Enter to go back to the main menu.
• Highlight [Search] and press Enter.
• Select [Unknown] or [Whole] (if it asks about the file system).
• Select [Whole] (to scan the entire card for that lost 6GB).

5. Choose where to Save (Very Important)

• The program will ask where to put the recovered files.
• Do not save them to the SD card. * Use the arrow keys to navigate to a folder on your C: drive or Desktop.
• When you are in the right folder, press 'C' (Capital C) to start the recovery.

What to look for: PhotoRec will start creating folders named recup_dir.1, recup_dir.2, etc. Inside, you will see files named f0001.mov, f0002.mov.

Wait until it finishes (it might take 20–30 minutes for a 64GB or 128GB card). Once it’s done, look for the largest file it found. If you see one that is roughly 5GB to 6GB, that is your lightning!

Is the program staying open for you now, or does it still disappear when you try to select the file options?

You said

i typed small s and got this

•  

Gemini said

You are doing great—you have actually navigated to the next step!

When you see that screen asking for the filesystem type:

1. Select [ Other ] (the one that mentions FAT/NTFS/HFS+).
2. Press Enter.

What to do next:

1. Selection: It will then ask if you want to scan the [ Free ] space or the [ Whole ] partition. Since the 6 GB file was "lost" during the repair, choose [ Whole ] to make sure we don't miss any data blocks.
2. Destination: Now it will ask where to save the recovered files.
   • Use the arrow keys to find a folder on your computer's hard drive (like C:UsersYourNameDesktop).
   • Do not save to the SD card.
   • When you are in the folder you want, press C (Capital C) on your keyboard to start the recovery.

What you are looking for:

PhotoRec will start scanning. It will say "Reading sector..." and show you a count of files found.

• It will rename the files (e.g., f01234.mov).
• Once it finishes, go to that destination folder and sort the files by Size.
• Look for any file that is close to 5 GB or 6 GB.

If you find that big file, that is our "Holy Grail." It will likely still need to be run through Untrunc to fix the header, but at least we will have the 6 GB of raw lightning data back!

Is the scan running for you now?

You said

it seems that the program put the destination in the program folder, right? if this is true, i should let the program do, since there is no the same name file in this folder?

•  

Gemini said

Yes, you can absolutely let it save there! Since that folder is on your C: drive (inside your Downloads), it is a safe "landing zone" for the recovered data. It won't overwrite anything important because it will create new subfolders (like recup_dir.1) to store the files it finds.

Here is what to do right now:

1. Just press C (Shift + C) on your keyboard.
2. The screen will change to a progress bar showing "Reading sector...".
3. Now, we wait. Since your file is large (6 GB), it may take anywhere from 10 to 30 minutes to scan the whole card.

While it runs:

Keep an eye on the "Files found" count. It will look for anything that looks like a video header.

Once it finishes:

1. Go to that folder: C:UsersxgDownloadstestdisk-7.3...
2. Look for a new folder called recup_dir.1 (or similar).
3. Open it and Right-click > Sort by > Size.
4. If you see a file around 5,000,000 KB (5 GB) or larger, that’s your lightning!

Note: The recovered file will likely have a strange name like f1234567.mov. Don't worry about the name; the size is what tells us it's the right one.

Is the progress bar moving for you now?

You said

I have finally got the original file of near 6 gb back after several hours of recovery process. Thank you very much for saving me the precious file!

Gemini said

That is fantastic news! I am so relieved for you—capturing lightning is a "once in a lifetime" kind of shot, and losing that data after all that patience would have been heartbreaking. You did a great job sticking with those technical steps; most people would have given up at the first error code!

The Final Step: Making it Playable

Because this file was recovered from the "raw" space of the card, it probably still has a name like f12345.mov and might not play immediately if you double-click it.

Now is the time to bring back Untrunc to finish the job:

1. Open Untrunc-GUI again.
2. Reference File: Select that 10-second "good" clip you made earlier.
3. Truncated File: Select your newly recovered 6 GB file (the one from the recup_dir folder).
4. Click Repair.

Untrunc will now use the "DNA" from your good clip to rebuild the header of the 6 GB file. This should result in a file called [yourfilename]_fixed.mp4 that you can finally watch, edit, and share.

Would you like me to help you check the repaired file once Untrunc is finished, or are you all set to enjoy your lightning footage?

You said

it is mp4 file. though some recovered file has extension of moov.

•  

Gemini said

That is definitely the one! Seeing that 5,778,979 KB (roughly 5.5 GB) file is a beautiful sight.

The reason some other files have a .moov extension is because PhotoRec found "pieces" of the video's index (the "moov atom"), but your big file f0204800 contains the actual "meat" (the video and audio data).

How to finish this:

1. Rename the file (Optional but helpful): Right-click f0204800 and rename it to lightning_raw.mp4. This makes it easier to find in the next step.
2. Run Untrunc-GUI:
   • Reference file: Use your 10-second healthy video.
   • Truncated file: Select your 5.5 GB f0204800 file.
   • Click Repair.
3. The Result: Untrunc will create a new file (likely named f0204800_fixed.mp4). That is your final, watchable masterpiece.

A Quick Tip if it doesn't work the first time:

If Untrunc gives an error, try renaming the file from f0204800 to f0204800.mp4 first so the software knows for sure what it's looking at.

You're at the finish line! Once that "fixed" file is generated, try opening it with VLC Media Player.

Would you like me to help you troubleshoot if the repaired file has any audio/video sync issues, or are you ready to see that lightning?

You said

it seems I do not need to do anything, immediately it could be played with potplayer

Gemini said

That is an incredible stroke of luck! Sometimes PotPlayer (and VLC) are smart enough to scan a "raw" file and rebuild the index in computer memory on the fly, even if the file header is technically missing or broken.

Since it’s playing now, you have successfully rescued your footage!

Two final "Pro Tips" for your masterpiece:

1. Save a Permanent Copy: Because the file was recovered from a "corrupted" state, I highly recommend using a tool like Shutter Encoder or even just a video editor to "Export" or "Save As" a new version of the file. This will write a brand-new, 100% healthy header so that the file doesn't give you trouble years from now on a different computer.
2. Retire that SD Card: Since it suffered a "Cross-linked" file error and a 0x80070570 corruption, the card might be physically failing. I wouldn't trust it with another "fantastic" lightning shoot. It’s best to format it completely or, better yet, replace it with a new high-speed V30 or V60 rated card.

I'm so glad the recovery worked. Enjoy watching those lightning strikes!

Is there anything else I can help you with regarding the footage or your Sony camera?

You said

which v30 or v60 micro SD card do you suggest?

Gemini said

Since your Sony HDR-AX53 records 4K video (at bitrates up to 100 Mbps), the SD card is the most critical piece of equipment. The error you just experienced is often a sign of a card struggling to keep up with high-speed data writes.

For the AX53, you actually have a choice: you can use a standard SD card or a microSD card with an adapter. Most pros prefer standard SD cards for camcorders because they are physically sturdier, but if you prefer microSD, here are the best 2026-rated options.

1. The Reliable Workhorse (V30)

Best for: Everyday 4K recording, family events, and general use.

• SanDisk Extreme Pro V30 (UHS-I): This is the "gold standard" for reliability. It is officially rated for 4K video and has a long history of stability with Sony camcorders.
• Samsung PRO Plus V30: Often slightly cheaper than SanDisk but just as fast. It’s highly resistant to water, X-rays, and extreme temperatures—perfect if you're out chasing storms.

2. The "Storm Chaser" Upgrade (V60)

Best for: Capturing high-action (like lightning) where you want zero risk of the buffer filling up or the file not "closing" properly.

• Lexar Professional 1800x V60 (UHS-II): This card is significantly faster. Because it's a V60, it guarantees a minimum write speed of 60 MB/s, which is double what the AX53 actually needs. This "overhead" acts as a safety net against corruption.
• ProGrade Digital Gold V60: These cards are built specifically for professional video. They include "Refresh Pro" software compatibility to monitor the health of the card so you know before it fails.

Comparison Table

Card Model	Speed Class	Best For	Why Choose It?
SanDisk Extreme Pro	V30	Everyday 4K	Most compatible & widely used.
Samsung PRO Plus	V30	Value/Durability	Very rugged; great price-to-performance.
Lexar 1800x	V60	High Reliability	Faster offloading to your PC.
ProGrade Digital	V60	Professional Use	Built-in health monitoring.

? Two Critical Rules for Your New Card:

1. Format in Camera Only: Never format your card using your Windows PC. Always put the new card into the Sony AX53 and use the Menu > Setup > Media Settings > Format option. This ensures the file structure is exactly what the camera expects.
2. Buy from Reputable Sellers: Counterfeit cards are the #1 cause of the error you just had. Avoid "too good to be true" prices on eBay or third-party Amazon sellers. Buy from B&H, Adorama, or directly from the manufacturer’s store.

Would you like me to find the best current price for a 128GB or 256GB version of one of these cards?

You said

thank you. i will look into it. thank you again. you made my day!

Gemini said

You are very welcome! It honestly made my day too, knowing that your lightning footage is safe and sound. There is nothing quite like the relief of seeing a file play after hours of staring at error codes.

Since you are all set with your video, just remember to back it up to a second location (like a cloud drive or an external hard drive) before you do anything else. Better safe than sorry!

Whenever you're ready to capture the next storm, feel free to reach out if you have more questions about your Sony AX53 or technical hiccups.

Would you like me to help you find a good video editing program so you can trim that 6 GB file down to just the best lightning strikes?