i have a usb that im using right now to copy files from my computer, but something strange happens, when done copying... all files are there but after ejecting usb.. then plug it again.. all files are gone.. but storage is used when i check properties of the drive.. dont tell me to do attrib -r -a -s -h etc.. or folder option then uncheck hide protected operating system or show hidden files cause it doesnt work.. any ideas?