Does Time Machine back up every file every time?

Time Machine backups are unfussy: unlike many proprietary backup software packages, you can browse a Time Machine backup either through its interface or via the drive in the Finder. However, it appears as if every backup is a complete backup.This concerned Macworld reader Peter, who just purchased a new iMac and a 4TB external drive to use with Time Machine. “This is going to fill up my external drive fairly quickly,” he worries.Time Machine just looks like it’s making a full