:| Yesterday I installed a new HD in my iMac. I restored from Time Capsule (2TB). Today when Time Machine attempts to backup, I get an error message saying what I want to backup can't fit on it. My 2TB iMac has around 1TB on it so how can my 2TB Time Capsule not be able to pull this off? Time Machine could not complete the backup. This backup is too large for the backup disk. The backup requires 1.10 TB but only 1.07 TB are available. It's asking me to select a larger backup disk or exclude files. This happened the other day and Apple told me to simply delete it and do a new backup which I did via ethernet (PITA) and everything seemed fine then.