So it seems like this is pretty common, and I've spent the last few weeks looking for a fix to no avail. Currently, I average 32GB per Time Machine backup. By the time one finishes, it starts the next one, which effectively makes my MBPro as useful as my 5 year old MB. I have excluded my downloads folder, parallels VM folder and external HDD's from the backups but have not had any success. In fact, after I excluded the 25GB parallels VM, my backup went up from 27GB to 37GB, this after a 32GB backup 1 hour ago. I've searched from programs to monitor the changes but haven't found one that works in 64bit Lion. Any ideas? Update: Just to confirm, my last backup was 37GB, before that 32GB and just now it tried to do another 37GB backup. I didn't have any time to do anything other than browse the web between backups. I would even deal with this if I could force Time Machine to only do 1 backup a day.