Review on High-speed TERRAMASTER D4-300 USB 3.1(Gen1) Type-C Storage External Hard Drive Enclosure - Hot Swappable, Diskless Solution by Preston Molden

The key features of the D4-300 have been removed over the years without changing the model number. There is no physical RAID hardware (and software from TerraMaster) like there used to be in this device. There is also no access to TerraMaster. Applications for this model currently (spring 2021). Do not buy this device if you expect any of the above. TerraMaster: You must change the model number if you want to change/remove core functions.