Wd my cloud dl2100 0tb 2 bay nas product specifications average latency na average read seek na battery na cachebuffer na data transfer rate na disk capacity 0 tb interfaces usb 30 x 2 2 x gigabit ethernet 2 x power supply dc in memory 1 gb expandable to 5gb with 4 gb udimm processor intel atom c2350 17 ghz turbo mode up to 20 ghz rotational speed na tape drive na write speed na product dimensions and weight l