Have the USB flash drive for about 4 months several times a week in use. Referring to the other comments: It's still my first and still working properly. Use it on Mac Pro (with USB 3.0 card) and sometimes to Windows PCs, even with USB 3.0. With exFAT The data rates (for large files) are outstanding: 70-80 MB / s write and read 135-140 MB / s. The only drawback for me: The stick is quite large for a USB stick.