|GoblinaS||Date: Wednesday, 2016-12-28, 4:17 PM | Message # 1|
Why can’t I copy large files over 4GB to my USB flash drive or SD card?
The capacity of your external flash drive or SD card is large: 8GB, 16GB, or more. There is enough free space on the drive. You can copy the
smaller files to the external drive just fine. Yet, when you attempt to
copy a large file (4GB or larger) to the external drive, Windows gives
you an error (such as: There is not enough free space on the drive, or similar.) Does this sound familiar?
If you experience such a problem, most probably it’s caused by the fact that your external drive or card is formatted with the FAT32 file system. This type of a file system has a built-in limitation on the size of the
files that it may contain. Although the total size of the files that
you can copy to a FAT32 drive could be as large as 2TB (or the physical
capacity of the drive, whichever is smaller), the size of each
individual file may not exceed 4GB.
This limitation may sound silly: why would anyone design a system
that would not allow for the larger files? The problem is, when the
FAT32 file system was designed (that was back in the days of Windows
95), no one anticipated that we would have such large files in use
today. Or, maybe the designers hoped that by the time such large files
become common, the use of the FAT32 system would be replaced by the more
In any case, how to solve the problem of copying the 4GB files? Easy:
you need to replace the FAT32 file system on the drive with a more
modern one, such as NTFS or exFAT. These newer file systems not have the 4GB file size limitation! Scroll
down this page for the instructions on how to change the file system.
Which file system is better, NTFS or exFAT?
They both a pretty good, but which one to choose depends on how else you are going to use the external drive or SD card.
The NTFS file system is supported by all modern versions of Windows
(including such dinosaurs as Windows XP, Windows 2000, and Windows NT),
and it also supports many other functions not supported by FAT32: file
security, encryption, compression, etc. However, if you plan to use the
external drive with non-Windows devices (such as an Android tablet or a
Mac computer), it would not be recognized by such devices out of the
box, and you would need to install additional software or tweak their
settings quite a bit to make them work with the NTFS drives.
The exFAT system is not as advanced as NTFS, but it has more support
on the non-Windows platforms. For example, many Android phones and
tablets, as well as the recent versions of macOS support exFAT devices
How to change the drive from FAT32 to NTFS or exFAT format?Let’s show how to it for NTFS first. There are several ways to go. If
the drive or card is empty or contains no important files of yours, the
easiest way is to use the Windows Format command to format the drive
with the NTFS file system. Specifically:
1. Attach the external flash drive to the computer, wait for Windows to recognize it and assign a new drive letter to it.
2. Open the Computer folder and locate the drive letter assigned to
the flash drive you want to format with NTFS (in the example below, it’s
3. Before continuing, open the drive in a window and make sure it’s
empty or does not contain any important files, because after you format a
drive, all information that was on it will be erased! If there are
files on the drive that you want to keep, take this opportunity to copy
them over to the hard drive or some other drive.
4. If you are sure that the external drive contains no important
files of yours, go back to the Computer folder, and right click on the
icon of the external drive:
5. Select Format from the menu, and then choose the formatting options:
6. Make sure to select NTFS in the File System drop-down list. That’s what determines the kind of a file system that the drive should have.
Also, you may want to select the Quick Format option, which should speed up the formatting process quite considerably.
7. Press Start, and Windows should warn you once again about erasing any existing information on the drive (see step 3 above). Again,
if you are sure the drive does not contain any irreplaceable documents,
confirm that you want to proceed with the formatting:
8. If you’ve selected the Quick format option, the formatting should take no longer than a minute or two.
As a result, you should have the same drive, but now it should have
the NTFS files system on it. Now you should be able to copy the files
larger than 4GB to the drive just fine.
In addition to formatting a drive with the NTFS file system, Windows
also offers a way to convert a FAT32 drive to NTFS. The difference is
that the conversion process would keep the existing files on the drive.
See Windows Help and Support of your computer for the instructions on how to do the conversion.
What if I want to use exFAT instead of NTFS?The steps to change to exFAT are the same as for NTFS, you only need to select exFAT in the dropdown box instead of NTFS.
P.S. Our encryption software USBCrypt can create a NTFS- or exFAT-formatted Virtual Encrypted Disk even if
the host drive is formatted with FAT32. This suggests yet another
solution: instead of formatting the host disk with NTFS, you can instead
use USBCrypt to create a NTFS-formatted Virtual Encrypted Disk. If you
do that, then in addition to breaking the 4GB file size barrier, you
would also get the strong security and password protection for files you
put inside of the Virtual Encrypted Disk. See the USBCrypt web page for more information or to download a free 30-day trial.
P.P.S. If you only need to transfer a large file from one computer to
another, you can get by with the FAT format if you use a file splitter
utility, like the one included in our file manager AB Commander. Using its Split command, you can split a large file into smaller chunks (say, 2GB each). Such
chunks can be put on a FAT-formatted drive without a problem. Then, on
the destination computer, use the Merge command to combine the chunks together into the original file. Of
course, if you want to open the file directly from the external FAT
drive, this won’t help you, but just to transfer the file between
Windows computers should work fine.
P.P.P.S. Here is what to do if Windows does not offer the NTFS format option.