OK this is a fairly simple question I think- but it's kinda hard to google for- So, I have a backup drive using windows 10's standard backup to an external drive. But I accidentally included a directory that I didn't want to, because it's too big, and now the drive is maxed; full. How do I remove it? I tried putting an exception for it in now, but it just tells me I can't run another backup because the drive is full. How do I remove a directory from an existing backup drive?