Hello dear forum members.  In the last year or so I have been using a NAS based on an ASRock AD2700B-ITX motherboard with a 2TB HDD. Because Plex could transcode only 720p video files, I opted to upgrade to an ASRock J3455B-ITX motherboard.  Current configuration:  ASRock J3455B-ITX motherboard 1x 4gb ddr3 sodimm with 4gbit chips WD20EARX HDD 2TB   Also included in the box - 12V 10A power supply to power up the NAS and a TPlink Archer C7 router.