I have a Lacie rikiki (500GB) harddrive that runs on Time Machine, and have been backing up for a couple of years. It now says it is full, and that it will delete old backups in order to make space to backup my current computer data. Does this mean that I am possibly losing important files (from two years ago) that I will therefore never again have access to? How does Time Machine decide what to delete?
It deletes the oldest backups, as well as deleting all old backups each day, to make one backup each day. Unless you don't want to backup any more, older backups must be deleted. If you really have important files, why are they just on the Time Machine drive?