So, I have an old Windows machine from the Windows 7 era. It\’s old enough only to have USB 2. Many, many years ago I bought a D-Link PCIe USB 3 card. Using D-Link\’s official Windows 7 drivers the card would work, but occasionally under heavy usage esp. with USB powered devices, I\’d get BSODs. Finally, I just uninstalled the card and decided not to bother with USB 3 on this machine.Fast forward to 2018 and I have been using this machine more in my home office and was looking at getting USB 3 again. I\’m now on Windows 10 with the Creative Update and I found that old USB 3 card in my cupboard and decided to give it another try. Well, guess what? It works just fine with MS\’s generic USB 3 drivers in Windows 10.P.S. In CrystalDiskMark, my 128 GB Lexar USB drive has OK read speeds and tolerable write speeds. However, my 256 GB Lexar USB drive has much faster sequential read speeds, but completely intolerable 4K random write speeds. It\’s not related to this machine. I\’ve noticed the same on other machines.128 GB FAT32 JumpDrive S73:Sequential read 116.5 MB/sSequential write 74.56 MB/sRandom read Q32T1 6.835 MB/sRandom write Q32T1 0.812 MB/s256 GB exFAT JumpDrive S75:Sequential read 153.1 MB/sSequential write 42.10 MB/sRandom read Q32T1 7.273 MB/sRandom write Q32T1 0.009 MB/s
Seems normal to me. 4k writes is the most challenging. Only SSDs can do it competently.