Adata SD810 External SSD review: 20Gbps speed on a budget, but not for pros

Adata’s SD810 external SSD is priced low for a 20Gbps USB drive, and it performs well in many benchmarks. But fill up its SLC cache with fast writes and you’ll have to live with hard drive-class speeds. 

Adata’s SD810 external SSD is priced low for a 20Gbps USB drive, and it performs well in many benchmarks. But fill up its SLC cache with fast writes and you’ll have to live with hard drive-class speeds.