Details: That's because if the hard drive is out of space, it can cause a mess if we only have one hard drive, and the drive runs out of space, and now all your apps are in sort of a limbo state... Granted, it may be good to use a computer and attach a 5TB or 18TB hard drive to it for qbittorrent, but sometimes we use a notebook to do it and our notebook may not have partitioned into two parts (such as on a Mac).