Bests & Worsts Reviews from Amazon

On my Windows 8 machines, the maximum sustained write speed is 77 MB/s with exFAT. Reads were double that. Strangely, pulling from my RAID-5 network drive (which saturates my SSD with 113 MB/s writes), I saw a somewhat inconsistent 55 MB/s. Block size had no impact on performance with exFAT. NTFS was 77 MB/s at larger block sizes and 72 MB/s at smaller ones. You'd think that sort of performance would make this drive suitable for general-purpose use. Not so much. Random-write performance is awful; par for the course for almost all USB flash drives, 3.0 or not. The controller hardware in these things is rudimentary. I briefly had this PNY configured as a download folder for a program that would automatically reconstruct downloaded files. It couldn't keep up with my 5.5 MB/s (megabytes/s) internet connection. The program interface was constantly unresponsive. While it's terrific bargain for general use (you won't find 80 MB/s sustained writes from a reputable memory brand for $0.39/GB anywhere else), I returned it in favor of a SanDisk Extreme 64 GB. Half the space and 30% more expensive, but with a proper drive controller that makes it just as responsive (and nearly as fast, with legit 150 MB/s+ writes and excellent random write performance) as an SSD.