The problem is with Disk Analyzer.
I have a file with size 4.14 GB and read by Disk Analyzer as 0.17 KB
See Pics below
CCleaner version 5.63.7540
I also found another file.
lubuntu-18.04-desktop-amd64.iso
the file is 1 GB and read as .12 KB
i've renamed the file as "123" and started disk analyzer again and have successfully read it, and then i changed the name again and also read it.
but the issue is why read it wrong in the first place ?