I'm going to order a Synology NAS drive tomorrow. Set up Ethernet into my upsampler vs USB keys. This is part in prep for my UPS upgrade, also just ordered 2 Transparent Ethernet cables for NAS and router...
If you are planning to locate the NAS in your audio rack, I strongly recommend a fanless model. I don't know the Synology line but I recently got a QNAP TBS-453A. It is fanless and I loaded it with 4 1GB SSD's. I used to have a regular NAS in the rack and the fans made too much noise. I don't hear any SQ different between rotating discs and SSD but I figure the SSD to be cooler running and more reliable.