just thought it would be simpler,I talked to Nvidia and they said the Hdd (old) my have to be reformatted.the new one doesn't matter as the Nvidia shield will automatically reformat new Hdd. If u don't know the Nvidia shield is a media player that you can stream tv from.it has an inter storeage of 12gb.So that why I have the 1 tb ext Hdd plugged in(Icould have used a flash drive or sd card but I had the Hdd lying around)NEW NEWS I was able to move ALL the data from the HDD to the Shield storeage so I should be able to just plug in the new Hdd and set the settings to accept the drive