Yesterday I was looking online to see ''how can I transfer pictures,files from my Nexus 7 tablet to my desktop computer with the usb cable''.. I've found several support forums like this one I'm using right now,someone has already asked a question like mine so I followed the best answer, I typed the commands in the terminal as the helper suggested,then I restarted my desktop pc,after that it didn't connect any more,it connects wireless usually,but since yesterday no connection:( I still have the page/link that shows the answer I've followed (the top one) : http://askubuntu.com/questions/207569/how-do-i-connect-a-nexus-7-to-transfer-files thank you!!