External drive backup has been the ... that gives up the RAID capabilities, see the Synology 1-Bay NAS Server. For $149, you get all of the features of the 2-bay system except for the data redundancy.

To help you make smart choices and find the best external hard drives, we're comparing two smart options: the Seagate Backup Plus 4TB and WD Black D10. Both Seagate and WD (née Western Digital ...