FAT32, also called File Allocation Table 32, is one of the oldest file systems available to Windows.
It works with Windows, Mac, and Linux. Files on a FAT32 drive are maximum of 4 GB and the partition must be less than 8 TB. If you are going to format an internal drive, you'd better not choose FAT32.
Because of its old age, it lacks the permissions and the security features built into the modern NTFS file system. Also, the modern versions of Windows are no longer compatible with FAT32.