|Two sets of "backups" for important data is the logical minimum. Ideally on two diferent media too. The chances of both backups (be they both on the same storage media, one on say a hard drive and another on dvd) going down, failing, at the same time is pretty remote?|
And storing them seperately is wise; likewise checking and renewing the copies too at intervals.
But to answer your actual question, I echo Derek's comments.
message edited by trvlr