Do you notice that free space on your hard drive decreases with a time?
Either other users of your computer "forget" to delete unnecessary files, or
Windows write something on the disk, or another program do this... And you can
sometimes write something, but forget to delete later. Afterwards it is
already difficult to understand, where - what (especially on large disks).
And you will have to periodically comb out thoroughly the whole disk in search
of rubbish.
The program "SpaceChecker" decides this problem. It will show you, where
exactly, in what folders and how many rubbish (or not rubbish) there was
appear from a time of previous checking.