How to Fix "File Too Large for USB" Error (4GB Limit)

Written by Luna
Technical Editor at Hasleo Technology, focuses on data protection and practical solutions.
Updated on August 14, 2026 | Free Windows Backup Software

• Why Does the "File Too Large" Error Appear?
• Solution 1: Format the USB Drive to NTFS
• Solution 2: Format to exFAT File System
• Solution 3: Use File Splitting Tools
• Solution 4: Compress Large Files Before Copying
• Solution 5: Resume Interrupted Large File Transfers with robocopy
• Differences Between File Systems and How to Choose
• Frequently Asked Questions
• Conclusion

In our daily computer usage, we often need to copy large files to USB drives for portability or data transfer. However, when you try to copy a file larger than 4GB to a USB drive, the system may display an error message like "File too large" or "The file is too large for the destination file system", causing the copy operation to fail. This situation usually occurs because the USB drive uses FAT32 format - while this format has good compatibility, it has a limitation that single files cannot exceed 4GB. However, this problem is not unsolvable. This tutorial will provide a detailed analysis of the root cause of this problem and offer multiple practical solutions to help you easily solve the issue of files too large to copy to USB drives.

Why Does the "File Too Large" Error Appear?

To understand this problem, you first need to know about the file system of USB drives. Most USB drives are pre-formatted to FAT32 by default, which is a legacy file system with good compatibility but has two key limitations:

• Single file cannot exceed 4GB: FAT32's design limit is that a single file cannot be larger than 4GB (precisely 4,294,967,295 bytes).
• Partition capacity limit: When formatting a FAT32 partition in Windows, the maximum recognized capacity is 32GB. Although the technical limit is much higher, this explains why large-capacity USB drives typically don't use this format.

When the file size you are transferring "hits" this 4GB limit, the system will give an error message. This problem is not limited to USB drives - all storage devices using FAT32 file system (such as memory cards, older external hard drives) will encounter the same issue.

Solution 1: Format the USB Drive to NTFS

NTFS (New Technology File System) is the default file system for Windows. If you need to copy files larger than 4GB to a USB drive, formatting the USB to NTFS is the most straightforward solution.

👍Advantages of NTFS Format

• No file size limit: NTFS supports file sizes far beyond daily usage needs (theoretical maximum 16EB, actually limited by partition size), completely solving the 4GB file limit of FAT32
• Better security: Supports file encryption (EFS), compression, and permission controls
• Higher compression efficiency: Supports disk compression to save storage space
• More stable journaling: File operations are logged, making data safer during unexpected power outages

Formatting Steps:

⚠️Preparation: Please be sure to back up all important data on the USB drive. Formatting will erase all files on the USB drive!

Step 1. Connect the USB drive to your computer, open "This PC", right-click the USB drive letter, and select "Format" from the menu.

💡Tips: On Windows 11, the new right-click menu hides "Format" - click "Show more options" (or press Shift + F10) to reveal the full classic menu.

Step 2. In the format window, click the "File system" dropdown menu and select "NTFS".

Step 3. Other option settings recommendations:

• Allocation unit size: Keep the default value
• Volume label: You can customize the USB drive name (e.g., "My USB")
• Quick format: It is recommended to keep this checked (default is checked)

💡Tips: Checking "Quick format" only takes a few seconds to complete, suitable for daily use. Unchecking it will perform a full sector scan and check, which takes a long time (possibly several hours). You don't need to uncheck it unless you suspect the USB drive has physical bad sectors.

Step 4. After confirming the settings are correct, click the "Start" button.

Step 5. The system will display a warning that formatting will erase all data. After confirming again that the USB data has been backed up, click "OK" to start formatting.

Step 6. After formatting is complete, the system will display a prompt. Click "OK" to close the dialog. Your USB drive is now converted to NTFS file system and can copy files of any size.

💡Tips: NTFS-formatted USB drives may not be recognized by some devices (such as certain TVs, stereos, car players, etc.) because these devices typically only support FAT32 file system. If you need to use it on these devices, please choose another solution.

Solution 2: Format to exFAT File System

exFAT (Extended File Allocation Table) is a file system specially designed by Microsoft for flash devices (such as USB drives, SD cards). It cleverly balances the wide compatibility of FAT32 with the large file support of NTFS, making it the best choice for cross-platform large file transfers.

🎯Core Advantages of exFAT:

• Perfect support for large files: Breaks through FAT32's 4GB bottleneck, theoretically supporting single files up to 16EB (practically capable of transferring dozens of GB or even TB of files without pressure).
• Excellent cross-platform compatibility: Supported by Windows, macOS, Linux, smart TVs, cameras, and many other devices.
• Optimized for flash storage: Unlike NTFS, exFAT has no journaling, so it performs fewer write operations and is gentler on USB drives and other flash devices, potentially extending their lifespan.

Formatting Steps:

Step 1. Open "This PC", right-click the USB drive letter, and select "Format" from the menu.

💡Tips: On Windows 11, click "Show more options" (or press Shift + F10) in the right-click menu to find "Format".

Step 2. In the popup window, select "exFAT" from the "File system" dropdown menu.

Step 3. After confirming everything is correct, click the "Start" button to execute the formatting.

💡Tips: Windows Vista SP1 and later natively support exFAT. Windows XP requires an update patch to recognize exFAT file system. macOS: 10.6.5 and later natively support exFAT. Linux: Modern mainstream distributions (such as Ubuntu) have native kernel support. Older versions may need to install exfat-fuse driver.

Solution 3: Use File Splitting Tools

If you don't want to format the USB drive (because you need to use it on other devices), or the USB drive already contains important data that cannot be easily formatted, you can use file splitting tools to split large files into multiple smaller files, copy them to the USB drive, and then merge them.

Using WinRAR to Split Files

If you have WinRAR installed, you can follow these steps to split files:

Step 1. Right-click the large file you want to split and select "Add to archive".

Step 2. In the compression window, find the "Split to volumes" option at the bottom left.

Step 3. Enter the size for each volume (for example, enter 2000M for 2000MB, or 2G for 2GB), then click "OK" to start compressing and splitting.

Step 4. After splitting is complete, copy all generated volume files (usually named filename.part1.rar, filename.part2.rar, etc.) to the USB drive.

Step 5. On the target computer, put all volume files in the same folder, right-click the first volume (.part1.rar), and select "Extract to current folder" or "Extract to..." to restore the complete file.

💡Tips: WinRAR will automatically recognize and process all volumes in sequence. You don't need to manually select multiple files.

Solution 4: Compress Large Files Before Copying

If your files are of highly compressible types (such as documents, spreadsheets, text files, database files, etc.), compressing can significantly reduce the file size. If the compressed size is less than 4GB, you can successfully store it in a FAT32-formatted USB drive.

Operation Steps:

Step 1. While Windows' built-in "Send to > Compressed (zipped) folder" is convenient, its compression rate is limited. It is recommended to install WinRAR or 7-Zip for better compression results.

• WinRAR users: Right-click the file and select "Add to archive".
• 7-Zip users: Right-click the file and select "7-Zip" > "Add to archive".

Step 2. In the compression settings interface:

1. Select the compression format as RAR or 7Z (usually have higher compression rate than ZIP format).
2. In the "Compression method" option, select "Best" or "Maximum".
3. Check "Create solid archive" option. This can significantly improve compression rate, especially suitable for folders containing many small files or similar data.
4. Click OK and wait for compression to complete.

Step 3. After compression is complete, check the generated file size. If it's less than 4GB, you can directly copy it to the USB drive. If it's still larger than 4GB, the file has limited compression space. You may need to refer to other solutions in this guide.

💡Tips:

1. Highly compressible files: Word/Excel documents, text files, code projects, BMP bitmaps, database backups.
2. Low compressibility files: Already compressed files such as .jpg images, .mp4 videos, .mp3 audio, .exe installers, .iso images. These files change very little in size after compression, so this method has limited effect.

Solution 5: Resume Interrupted Large File Transfers with robocopy

Important: robocopy cannot bypass the FAT32 4GB file limit - no copy tool can, because it is a limitation of the file system itself. If your USB drive is still FAT32, first format it to NTFS or exFAT using Solution 1 or 2. Once the drive supports large files, robocopy is useful when a very large file (tens of GB) keeps stalling or being interrupted during the copy, because it can resume from where it left off instead of starting over.

Step 1. Press Win + S, type "cmd". Right-click "Command Prompt" and select "Run as administrator".

Step 2. Enter the following command to copy:

robocopy "source folder path" "destination folder path" filename /z /r:3 /w:5

💡Tips:

• /z - Restartable mode, resumes from the breakpoint if the transfer is interrupted. It slightly slows down the copy, but guarantees you never re-copy an already transferred portion
• /r:3 - Automatically retries 3 times if a copy fails
• /w:5 - Waits 5 seconds before retrying

Step 3. Wait for the copy to complete. After copying, the command line displays a summary including the number of files copied and any failures. If the transfer was interrupted earlier, simply run the same command again - robocopy will continue from the breakpoint instead of re-copying everything.

Differences Between File Systems and How to Choose ✨

After understanding the various file systems, how do you choose the one that suits you? Here is a comparison of three common file systems:

❤️Selection Recommendations:

• Cross-platform file transfer: Choose exFAT, good compatibility and supports large files
• Pure Windows environment: Choose NTFS, supports large files, high security (encryption, permission settings), less likely to be damaged during power outages
• Old devices or special purposes: Keep FAT32, unmatched compatibility, almost all devices can recognize it

Frequently Asked Questions

Conclusion

As a recap, the "file too large" error almost always comes from a FAT32-formatted USB drive, which caps a single file at 4GB. If the drive can be formatted, exFAT is the best all-round choice for cross-device transfers, while NTFS suits Windows-only use with security needs. If formatting is not an option, consider splitting or compressing the file instead.

Before formatting any USB drive, remember to back up the data on it first - formatting erases everything. If you're also looking for a reliable way to protect your files, Hasleo Backup Suite can help you keep important data safely backed up and restorable, complementing your large-file transfers.