Hey folks. I've tried to find a solution to this problem elsewhere but have still found no satisfactory solution. My C drive is 500 Gb, of which 457 are available to use. The folders I have on the C drive total less than 200 Gb, but the drive shows only 40.4 Gb free. When using Tree Size it shows that I have 220 Gb of System Volume Information that I can't delete or move in any normal way. I've tried running disk cleanup but it doesn't register these files. I have been told it's due to System Restore information, but there is clearly much too much of it, if that's the case. This must be a common problem, surely. Does anyone recognise it, understand it and know how to sort It?