NAS
Great review site: http://www.smallnetbuilder.com
I could use http://freenas.org with an old dell server I have.
Must haves:
- RAID 1
- The size of the drives should not be limited
- Media Server
Do I care about having AD?
Nice to have power management so its not always running 24/7.
I don’t think FTP is important
NFS/CIFS/SMB – Its important to be able to mount it from any OS