Hey guys, I am new to this forum I have a had a problem occuring for a long time now, and I have searched high and low for answers, including on this forum, for a solution to this issue. It began with one USB that continued to eject itself on my iMac, and reappearing again in finder with the error box saying "the disk was not ejected properly etc". I tried other USBs and they all seem to do the same thing. Just today, dad brought home a relatively new USB with his files on it, so it clearly works on his MacBook Pro. The exact same happened.. Any help would be much appreciated, cheers!