So my system it telling me that I cant use E: to do my system backup. See attachments for what I am seeing. (I'm aware that I don't have enough space currently to do a backup but that's not really a relevant issue) I've been getting this error for almost a month and am getting to the point where I NEED to make a backup. But it refuses to allow me to select E: even when I have 500+GB free. OS is installed only on C: Edit: No other operating systems installed on any other drives. No dual boot.