This is the 2GB version of the QNAP TS-332X Series. There is a 4GB version available from the factory as well but I would recommend buying a 8 or 16GB DDR4 RAM module and inserting it yourself as it is more cost effective if you need the additional RAM. Chances are if you are using this for basic NAS functionality (storing files, backups) then the 2GB version will be just fine. However... if you are a power user and want to exploit this little power house to the fullest you are going to want at least 8GB of RAM in here as it will likely be your primary bottleneck if you are running on 10Gbit Ethernet.
The TS-322X series of NAS devices from QNAP are aimed at the SOHO crowd. I could easily see these boxes being dropped at retail stores to server as primary onsite storage and even as the primary onsite application server. This will 40 - 60 users simultaneously if you run POS or Hospitality software. The idea that you can get 28TB of RAID5 storage with a m.2 SSD acting as a cache is really a industry first for a box this small. Sporting two gigabit ethernet connections and a ten gigabit SFP+ port means you can really utilize this guy to the limit of the drives installed without bottle necking at the network level. Even if you have not invested in ten gig networking, the option of bonding the two gigabit network connections means you are easily looking at up to 200MB/s access to your data. This is a really interesting box that is in a segment all by itself. My only wish is that they would have offered a x86 version with maybe a low power Y series or Pentium processor as this really could replace allot of home lab equipment in one swoop.