Also, if you intend to use flexraid for 'separate drives', this still won't work if want to try to add/remove the drives 'for backup'. The device is designed to keep drives in it until they either fail or are upgraded. Once you pull a drive, its marked as failed and you will not be able to re-add it without it getting formatted.
nv+ ~ 1gb ram ~ 4x WDC WD20EARS-00S8B1 ~ 5555 GB ~ power supply dead
ultra4 ~ 4 gb ram ~
pro business ~ 4gb ram ~ 2x Seagate ST4000DX000-1C5160 ~ 2x Seagate ST4000DM000-1F2168 ~ 10tb
pro 6 ~ 4gb ram ~ dual redundancy ~ 4x Hitachi HDS724040ALE640 ~ 2x Seagate ST4000DM000-1F2168 ~ 14tb
A/V streaming ---> Subsonic
---> HTC One ~ Note 2 ~ Nexus 7