Issue:
Your backup software (Windows Backup, Retrospect, WD Backup, Memeo, etc.) shows an error after attempting to backup more than 4 GB of data to an external hard drive formatted as FAT32.
Cause:
This issue is caused by an addressing limitation of the FAT32 format on the external hard drive. Windows is unable to transfer or create files larger than 4 GB on a hard drive formatted as FAT32. For more information about this FAT32 limitation, please see $EN_ANSWER_20778.
Solution:
To resolve this issue, the drive must be reformatted or converted to NTFS (Windows NT File System). NTFS does not have a transfer or file creation size limitation. For directions on how to reformat or convert a FAT32 formatted hard drive as NTFS, please see $EN_ANSWER_16074.