Earlier quoted context omitted.
it takes months to get everything backed up, and now the just the file lists or whatever is taking up 8GB+ on my disk (i use a smaller SSD as the primary drive so space is precious). I contacted support and their only solution is to create a new account and go through many more months of backing everything up again.
> it takes months to get everything backed up What kind of internet connection are you on? I recently reinstalled my mac from scratch (El Capitan upgrade went haywire) and had to redo my backblaze backup. I uploaded the 500 GB to Backblaze in under 24 hours.
Also, could it be that the "re-upload" was able to detect your older copy of the files and reuse them? I can rsync terabytes in minutes over slow connections when the other side already has the files ...