If your external hard drive is in FAT32 format then you will not able to copy files into external hard drive which is larger than 4GB. It will give error like “File is too large for destination file system”. If you need to transfer file more than 4GB then you have 2 options. One is split file in smaller size which is less than 4Gb. Option 2 is conver your external hard drive into NTFS format which has no limit on file transfer.
Windows Vista and up versions (windows 7, windows 8 & windows 10) provides the FAT to NTFS Conversion Utility (convert.exe) for this purpose. To convert drive C:, for example, just open a Command Prompt window with administrative access (cmd.exe) and type:
convert c: /fs:ntfs
Note that “c” is the drive letter so make sure to change it to the drive that you want to convert – otherwise you will be converting your drive “c”.
I successfully converted my 1Tb Transcend external hard drive from FAT32 to NTFS System. It tooks 15 to 20 minutes for complete converting. No data loss after successfull conversion.
If in future you need to convert NTFS to FAT 32 without data loss.