Review on 💾 VANSUNY 256GB USB C Flash Drive - Super Speed Solid State USB Drive (256G, Silver) - Dual Drive USB Type C Thumb Drive 350Mb/s USB 3.1 by John Collins

I bought several of these after reading good reviews, three for 128GB and two flavors for 256GB. What is shown in the picture happens for all the discs I have. The first 1/4 of the disk (32 or 64 GB) is very fast, 300 Mb / s, after filling this chip, the speed drops to 150 Mb / s, the remaining half of the disk is about 90 Mb / s. Basically say you buy a really fast 32GB flash drive with legacy storage stacked on top. I sent them all back because I don't like stealth.