The crew at Vortex put the HyperX SAVAGE EXO external solid state drive through its paces to see what it is made of. Here's a quote from the full review:
The HyperX SAVAGE EXO uses 3D NAND and the USB 3.1 Gen. 2 protocol to present speeds approaching 500MB/s in sequential reads and 480MB/s writes. The USB 3.1 Gen. 2 connection is catered for in both Type-C and Type-A, depending on your use-case. HyperX claim the drive can reduce PS4 and Xbox One game loading times by as much as 20%.