TreeSize Free is a program to find out which files are taking up disk.

When I was checking the disk space consumed on my device, I found that the disk contains more space than my files. I searched for the files that take up all this space, and I could not locate them exactly.
After a search, I found TreeSize, a small program that scans the disk, identifies large files that take up space and puts them in a clear tree order.
Program explanation:

Download from here.