Wd my cloud dl4100 16tb 4 bay nas product specifications average latency na average read seek na battery na cachebuffer na data transfer rate na disk capacity 16tb drive bays 4 interfaces usb 30 x 2 usb 20 x 1 gigabit ethernet x 2 power supply dc in x 2 memory 2 gb expandable to 6 gb with 4 gb sodimm processor intel atom c2338 17 ghz turbo mode up to 20ghz rotational speed na tape drive na write speed na product dimensions length 913 in 232