Wait a minute!
<<Most don't want to know what the file system is but want "features.">>
Altho I've been tempted by NAS (affordable types), I have resisted for two reasons:
1. Almost all cheap NASs uses Linux SMB-CIFS and if the enclosure dies, I've got to either get a replacement (compatibility may/maynot be easy to find) or use some translator to access with a Windows PC or boot a distro. Not exactly instant recovery!
2. Even with GbE, thruput continues to be low.
Nothing yet beats a stripped down PC with direct attached SATA for a highly manageable, cost effective SOHO solution.