When i mount the USB drive from the pull down status bar and start to copy music or movies, it start copying and within a minute, it unmounts itself. In the phone, i get to hear 2 sounds - one that comes when i disconnect the USB and again the one that connects and it says USB is connected. I have to re-mount it manually and it is very difficult to copy big size files. I tried for about 30 mins and could not copy a 11 MB MP3 song. This is a brand new phone and the USB cable came with it. I tried 2 different USB ports and tried to hold the cable for a possible loose connection. Regards, Sri Harsha.