We were using this in our small office as a local backup target for our server and desktop PC's. We replaced this with a DS923 model to gain more storage and performance.Includes 2 x WD Enterprise-class 2 TB hard drives. Hard drive power-on hours show 6.65 years of powered-on time. S.M.A.R.T. on both drives (quick test) show "healthy". It worked well for all the years we were backing up to it. It has the latest DSM OS installed. Original power cord included. System will be factory reset (again) before being shipped out.