|A mass storage device could be any storage device that is portable or removable. USB external hard drives, flash drives, memory cards. |
"The usb is showing a light that is is def getting power and is on?
any other thoughts???"
What light, where? If you have an internal card reader check to see if you have media inserted. Also could be an optical disk (CDR/W or DVDR/W) that is configured to work as a removable drive. Check for disks.