I was intending to upgrade the SSD to a 1TB as the 256 was filling up with crap, at one point only 3GB free. I ordered an M.2 SSD but when it came it was physically the wrong size, so I sent it back. It seems the size of drive I need might only be available from Dell. Anyway I've done some housekeeping, stopped d/loads and other rubbish going to the C drive and I'm trying to keep it for the OS and Utilities, so currently I'm back up to 77GB free which isn't too bad. I'd still prefer to at least double the SSD size though.