Purchased to renew my aging fleet of USB2.0 key. CrystalDiskMark tested and compared with the key Emtec 32GB usb3.0 a friend. This key i i Key EMTEC i i Write Read Write Read Seq i i 44.23 18.20 32.9 4.42 512K i i 31.4 39.43 9.73 2.54 4k i i 4.12 0.72 5.00 0.16 QD32 i i 4.8 4.48 0.83 0.09 Speed in Mb / s on empty 2 key formatted as NTFS. There are no big differences in writing, by reading against, y 'change. Cheap, so I'm happy with my purchase if I expected better read throughput.