Review: QNAP TS-251A NAS is a great choice for a home media server and network backup storage - 9to5Mac
Amazon.com: QNAP TS-251+ (8GB RAM version) 2-Bay Next Gen Personal Cloud NAS, Intel 2.0GHz Quad-Core CPU with Media Transcoding (TS-251+-8G-US) : Electronics
How to upgrade the RAM on your QNAP NAS and which one to buy – NAS Compares