So one of the issues that has plagued the site over the last few years has been the lack of free space. For the most part the drive has been 92-95% full. I actually was researching other hosting options to see if I could get more space for the same/similar price.
Just last week I got below 88% and this was after cleaning out as much junk as I possibly could. However once that happened, some backup tasks now had enough space to write large files, and they started filling up the drive with these large files, taking up all space and filling it up to 100%.