I just restored my system early this evening with Time Machine. After doing some stuff tried to run a back up and noticed that it was deleting far more backups than necessary: It seems like it thinks it has to backup the whole drive, and so is deleting everything to make up the space. At best I've copied a few GB over from another drive. Either way, it's strange that is requested 308.08 GB given that my iMac HD only has 264 GB of stuff. This Apple article seems to confirm this: http://support.apple.com/kb/TS1338 Is there any way to just do an incremental backup? I don't want to loose my (remaining) previous backups is possible? Thanks.