My 500gb backup hard drive is showing only 25gb left. My main 650gb hard drive shows only 150gb used. How is this discrepency possible? Also when I examine the I drive can only get it to add up to less than 200gb, the largest file being an computer image file.
Blocking factors and file sizes. If a disk is blocked at 32k even a single byte file will take up a whole block, There is often a huge difference between the sum of the individual file sizes and the space they take up on the disk.