Even better, use Time Machine to a NAS! You can have redundant drives, in case one dies! Migrating Time Machine backups from a USB drive to a network share is

Even better, use Time Machine to a NAS! You can have redundant drives, in case one dies! Migrating Time Machine backups from a USB drive to a network share is not supported, but it's doable, not impossible. (This is something I've done before, and in fact I'm doing this for family right now.)