Ask the seller for a SMART report with a tool such as CrystalDiskInfo.
I found the following info:
https://www.eteknix.com/adata-storage-computex-2017/
"First up, we have the SR1100, their latest Enterprise Server grade drive. It uses 3D MLC NAND and comes in 256, 512, 1TB, and 2TB models."
Adata's catalogue has some basic info on page 31:
https://www.adata.com/upload/BusinessSolutions/Download/Catalog/catalog61.pdf
The available capacities are 100 / 200 / 400 / 800GB. The SSD has a DRAM cache, hardware AES encryption, hardware power loss protection and "RAID like technology". It also supports "Windows eDrive encryption". The controller appears to be Silicon Motion (SMI).
I don't know which capacity specs to believe...