[SOLVED] cannot assign drive letter!

for years i have used a slow laptop and i have recently upgraded to a pc. i have a usb mass storage device that i have used with the laptop for years but since installing it on the computer the device does not show up in my computer. i have been searching the net for days and cannot find any soultion. i have tried everything... im going crazy!! i have tried right click on my comp .. manage .. disc management .. and it is detected but when i right click to changer drive letter it wont let me it only says properties and help. the device is listed as healthy (active) but i cannot access it. iv uninstalled .. updated it .. everything! it has alot of cds and vids on there and i dont want to lose them

i would be greatful for any help