The issue has been fixed, I found "System Volume Information" directory used many of disk space via WizTree tool, it's system recovery data, just removed and ok now.

Thank your guys.

Hi,

Thanks for your replied so quickly.

Disk D placed some files which user created by himself, no Windows or application files.

I will try Wiztree later and updated.

Thank you so much.

A strange thing, I found some of my co-works PC(Dell 3080) disk D space is decreasing day and day.
OS:Windows 10 Pro
Disk D has a total of 135G space, all of files only used 9G, but the free space...