At a glance Expert’s RatingProsGood overall 20Gbps performanceSlim, good-looking form factorCompetitively priced, especially the 4TB capacityConsSlow 450GB write due to secondary cache exhaustionOur VerdictThe Adata SD810 is an affordable, 20Gbps USB SSD, and currently a bargain in the 4TB capacity. It breezed through the majority of our tests, but slowed drastically in the 450GB write, which will only affect the rare user. Price When Reviewed1TB: $100 I 2TB: $160 I 4TB: $300 Best Prices Today: Adata SD810 20Gbps USB SSD Retailer Price Adata 99.99 View Deal $99.99 View Deal Price comparison fr…