If your pen drive can’t copy a large file and Windows shows the message “The file is too large for the destination file system,” even though the USB drive has enough free space, you are most likely facing the FAT32 4GB file size limit.
This problem is very common with USB flash drives (pen drives). Many users try to copy a 5GB, 7GB, or larger video file to a USB drive and receive the “file too large” error. The issue is not the storage capacity of the drive. It is caused by the FAT32 file system, which does not allow storing a single file larger than 4GB.
Check If Your USB Drive Is FAT32
Before applying any fix, confirm the file system of your USB drive.
- Connect the USB drive to your computer.
- Open File Explorer.
- Right-click the USB drive.
- Click Properties.
- Check the File System field.
If it shows FAT32, the 4GB file size limit applies.
Why FAT32 Has a 4GB File Size Limit
FAT32 is an older file system that is still widely used on USB drives because of its compatibility with Windows, macOS, TVs, cameras, and gaming consoles. However, it has one major limitation: a single file cannot exceed 4GB in size. Even if your USB drive has plenty of free space, a 7GB file cannot be copied to it.
To solve this issue, you have two practical options.
Solution 1: Format the USB Drive to exFAT or NTFS
The most reliable and permanent fix is to change the file system.
Choose the Right File System
NTFS
- Best for Windows computers
- Supports very large files
- Includes advanced features like encryption and permissions
- Limited compatibility with some non-Windows devices
exFAT
- Best for USB drives used across different devices
- No 4GB file size limit
- Better compatibility with Windows and macOS
For most users, exFAT is recommended for USB flash drives.
How to Format the Drive
Important: Formatting will erase all data on the drive. Back up your files first.
- Back up all files from the USB drive to your computer.
- Right-click the USB drive in File Explorer.
- Click Format.
- Select exFAT or NTFS as the File System.
- Leave other settings as default.
- Click Start and confirm.
After formatting, you will be able to copy files larger than 4GB without errors.
Solution 2: Split the Large File into Smaller Parts
If you must keep the drive in FAT32 format, you can split the large file into smaller parts under 4GB.
Each part will be copied successfully, and later you can combine them back.
Using 7-Zip
- Install 7-Zip on your computer.
- Right-click the large file.
- Click Add to archive.
- Choose archive format (zip or 7z).
- In Split to volumes, bytes, enter a value like 1000M (or any size under 4096M).
- Click OK.
The file will be split into multiple smaller files (for example: file.7z, file.7z.002, etc.). Copy all the split parts to the FAT32 USB drive.
Extracting the Split Files
TTo restore the original file:
- Make sure all split parts are together in the same folder.
If the split files are stored on the FAT32 USB drive, you have two options:
Option 1 (Recommended): Copy First, Then Extract
- Copy all split parts from the USB drive to your computer (for example, Desktop or any NTFS/exFAT drive).
- Right-click the first file (usually ending with .7z).
- Click Extract Here to extract to the same folder.
This is the safest method.
Option 2: Extract Directly to Another Drive
- Leave the split files on the USB drive.
- Right-click the first file (ending with .7z).
- Click Extract Files.
- Choose a location on your computer (NTFS or exFAT drive).
- Click OK.
Do not extract the file back to the same FAT32 USB drive, as the 4GB limit will cause the extraction to fail again.
7-Zip will automatically combine all parts and recreate the original file in the selected location.
Using WinRAR or Similar Software
WinRAR and other archive tools can also split large files.
The split option may appear in a different location depending on the software version, but the concept is the same:
- Choose a split size below 4GB
- Create the archive
- Copy all parts to the USB drive
To extract:
- Place all split parts in the same folder.
- Right-click the first part (usually ending with .part1.rar).
- Select Extract Here.
The software will automatically join all parts into the original file.
If your pen drive cannot copy large files and shows the “file too large” error, the cause is almost always the FAT32 4GB file size limit.
The best long-term solution is to format the drive to exFAT or NTFS. If formatting is not possible, splitting the file into smaller parts using tools like 7-Zip or WinRAR is an effective workaround. Choosing the correct file system for your USB drive will prevent this issue in the future.
