Can Time Machine backup flash drives? So every time I plug it in, it backs up anything that has changed. Just to be clear, I'm not trying to save the backups onto the flash drive, which is what a lot of people seem to want to do, but rather to backup the contents of the flash drive onto my mac. Currently I have an automator script on the flash drive which, when I run it, copies everything into an archive on my mac. But this isn't a very ideal solution, since it copies everything even if it hasn't changed.