OK maybe i did something stupid but i hope its not hopeless.
I tried to compress one file on my usb stick and it didnt have enough space and now when i put my usb in pc it says free 1,6 gb free 2.4 gb but when i open removable disk it says there are no files on this disk.
I tried open it on other pc and it says same thing.
How can I find my files and folders on it