Here's my NAS experience... I've got a QNAP TurboNAS and a Netgear ReadyNAS, each with 4x3TB WD Red drives. Both are using JBOD mode, as RAID isn't suitable for my situation. The QNAP is used to back up 4 drives in my main PC - an assortment of downloaded music/video and the random chaos that is My Documents. By setting up Samba shares on the NAS I can stream the contents over my wired & wireless network and thus listen to albums via my Sonos system and watch video via my media PC. It is switched on all the time, with the drives spinning up and down as needed, but can also wait in standby for a wake on lan packet. The Netgear is full of off-air TV recordings and is backed up to external drives. The firmware doesn't support spin up/down yet so I have to manually wake it and put it to sleep as required, using the NAS Utils app for Android. Annoying, but it was half the price of the QNAP so I can't really complain.