Question: how to retrieve deleted files from usb using command prompt?
Answer: Press Win + R keys and type: cmd, hit Enter to open Command Prompt window as an administrator.
Type: chkdsk E: /f and hit Enter. ( ... 
Type: Y and hit Enter to continue.
Type: E: and hit Enter again. ( ... 
Type: E:\>attrib -h -r -s /s /d *.* and hit Enter. (