Finally bought an external backup drive. However, I asked a few questions to one of the 'tech guys' at JB Hifi about how the one I initially looked at would work with linux, his response, I thought that system was around years ago and long gone! At that point we parted ways as he knew very little about what I wanted! I went to another store! I tried to get the red WD as suggested by many but they had only one in stock so I went with a fairly similar style of disk seagate to pair together and in a Synology shell