Yev from Backblaze here -> There are certainly items related to Backblaze that we need to back up. You can exclude pretty much everything inside of the C: drive, but we do require the drive itself to be selected. Also, we chose the "backup everything, and let the user exclude data" route because the other way seems like a gap. For example, a lot of backup solutions make you select what you want to back up, but what if you forget something? Or forget to add something later? That would leave a hole in the backup, so we go the reverse route!