The overwhelming majority of USB flash drives you buy are going to come in one of two formats: FAT32 or NTFS. The first format, FAT32, is fully compatible with Mac OS X, though with some drawbacks ...
I've made the long overdue decision to keep backups on an external USB drive, but should I go with NTFS or exFAT for the drive? We have an all Windows household here, and although I fiddle with Linux ...