Bests & Worsts Reviews from Amazon

The Kingston Micro 3.1 offers decent read performance and, unlike many of its competitors, is actually keyring friendly. But the write performance is worse than many USB 2.0 drives. Kingston is an American company and generally offers reliable well engineered products. But, despite costing more than most of its competitors, this drive has horrible write performance. The performance, as you can see in the attached screenshot montage, offered decent read speeds of just over 100 MB/s but write speeds were below 20 MB/s. The Transcend 64GB JetFlash 710 USB 3.0/3.1 Flash Drive (TS64GJF710S) offers much better write performance but is a "form over function" design and doesn't fit as well on a typical keyring. The much larger Samsung 64GB USB 3.0 Flash Drive (MUF-64BA/AM) is very poorly shaped and even less keyring friendly than the Transcend. The Samsung 64GB USB 3.0 Flash Drive Fit (MUF-64BB/AM) offers much better performance but won't fit securely on a keyring. And the SanDisk Ultra Fit 64GB USB 3.0 Flash Drive (SDCZ43-064G-GAM46) [Newest Version] doesn't offer anything worthwhile unless you value its ability to perhaps melt the USB port in your computer as gets very hot. So, in summary, if you don't need it on a keyring, get the Samsung Fit instead. If you do want it on a keyring, and can live with really slow write performance, this is at least one option. Otherwise keep looking. For the geeks out there, I did all the testing on a motherboard USB 3.0 port (not a hub) on a fast i7/SSD desktop system with nothing else running or sharing USB 3 resources. All the drives were new and formatted with exFAT.