Originally Posted by babyb
II've not used TC to any great lengths, but from what I've read, it performs "incremental" back ups and not "full" backups. That means that your first back up takes ages because it copies everything, Then as you create/edit new files on a daily basis it only copies those files that have changed. So if you delete your back up files. It will simply create new ones. However it'll take a while again.
I'm curious - I started using TimeMachine the other day and the used space on my TimeMachine disk is quite a bit less than my laptop used space. I looked and it appears that the backups complete successfully, my files are there, but I'm not sure what's going on.