I have samsung external portable harddisk device last 1 year this is looking good device but one is mager issue in this device data transfer spreed issue.
many type data transfer issue in this device
folder data transfer issue
Big issue document transfer laptop to device then spreed very slow .
if we will create a new folder between same device then we will move data one folder to another folder then I am facing same spreed issue.
so I will suggest to you please findout another device if you are planing to buy new device .