We get a Terramaster appliance about two times per year, and while they aren't the most recognizable brand, they do tend to use similar hardware to the Synology and Qnap.
The F2-221 is the latest in the two-bay Terramaster lineup. This new solution ditches the aging J1800 SoC for a new Intel J3355. While this new CPU is still a dual-core platform it's built on the new 14nm process and while the clock speed is lower, it does offer higher single core performance than the previous solution. Terramaster has paired this with 2GB of DDR3 that is soldered directly on the motherboard for upgrades they have allowed a single memory slot that accepts up to 8GB sticks.
Moving on we have two bays as stated above with support for both 2.5" and 3.5" drives. Maximum internal storage capacity is reached at 28TB using 14TB disks. Connectivity is offered via two-gigabit ethernet ports with additional storage expansion via USB 3.0.
MSRP of the Terramaster F2-221 comes in at $249.99 with a one-year warranty.