I have Ubuntu 13.10, and whenever I copy something to USB sometimes it works but mostly when I check the data on other machine (with Windows or Ubuntu) it shows nothing or if it does then its partial data for example if it was a movie or a video then it would be of few minutes not full video, same case is with any other files. I have tried to format the USB several times and send the data again, but it doesn't do anything, and sometimes it transfer the data perfect. So I don't know what exactly I should do?
Note: I have tried many USB's
cp
?cp
and its doing the same