Originally Posted by onmiway75
thanks for all the replies everybody. not sure where all my disk space is disappearing to. when you click on my computer, it says I have 878 of 919gb's free. so yes, 81 of my gb is being used on something just for the pc to run. I only have a few programs installed so I don't think I'm using 41 gb's of disk space. I tried using Windirstat and it shows I have 14 gb's in files and 13.4 gb's used in windows if I'm reading it correctly. there is not much more than that except a few gb's for program files, users and sources.
also, where do I find the hdd backups?
There isn't 81Gb being used for "Windows to run on"... it doesn't exist! When you buy a 1Tb drive, you don't get 1Tb of space.
Because of the way computers format hard drive, you will never see a drive format to the full space.
This occurs because the way computers address memory is based on the binary system. In the binary measuring system, one GB does not equal 1000 MB. Instead, one GB equals 1024 MB (since 1024 is binary 2 raised to the 10th power).
However, hard drive manufacturers measure drives in decimal numbers. For a hard drive, one GB does equal 1000 MB.
So, when you format a drive, you actually lose 24 MB per GB formatted simply becuase the computer is formatting in binary a drive that was sold measured in decimal. There has actually been a long-standing feud in the computer world to get hard drive manufacturers to start selling drives based on binary measures so when you buy a 1 TB drive, you'll get a 1 TB drive. Back when drives were small, the amount of space lost was negligible. But now with TB drives common, the amount of space lost, as you are seeing, is quite large.
Add to the above facts that a certain amount of space is needed for the drive partition tables and, of course, Windows itself you will generally see the amount of space you have after a clean format and install.