I have a via netbook with IC Sandwich installed. I am new to android and am just learning my way around the interface. I can load and play a pc hard drive via usb as well as flash drives for copying files easy enough. I do not see an option anywhere, either on the device or in my file manager to properly unmount them when I am finished. Talking with people, I'm told to just remove it but when I do that I get a message warning me to properly unmount the device. What is the proper way to unmount usb devices with android 4.0? I have been using linux on my pc's for years so I am familiar with the file structure but so far this has proven to be elusive.