For more information about what these limitations are please see Answer ID 20778: File and partition size limitations using the FAT32 file system (Windows and Mac). This is a file system limitation that affects both macOS's and Window's, and the only workaround is to format the drive to exFAT. FAT32 has several limitations, including a 4 GB per-file limit. Most WD Drives come formatted in the NTFS (Windows) or HFS+ (macOS) format.įor a hard drive to be able to be read from and written to on both a Windows and macOS computer, it must be formatted to ExFAT or FAT32 file format. This is useful if a drive is being used under both Operating System (OS) to move files between the two environments. A Western Digital external hard drive can be used on both Windows and macOS.