I delete files from usb drive it show me something left

[Val Di]

Hello, i delete files from usb drive it show me something left, but i move all files to trash.

 

[zycuda]

I would be concerned that you have a virus if files won't get deleted. Do you have an an anti virus?

 

[danny2000]

how did you delete the files? did you format it? Some USB drives include software on the drive for encryption and other things.