Back in 07 when I bought this computer I also purchased a 300 Gig external hard drive. Like a good little wanna-be geek, I did a full backup and set up incrimental backups to occur once a week. My computer is fine and is having no issues to speak of. I just discovered that my external hard drive is completely full and the last time it was able to perform a backup was in December 2009. I'm thinking the easiest thing to do is just delete all of the old backups and start fresh with a new full back up. Am I correct? Would I be better off just deleting everything or would I come out better reformatting the external hard drive?