I tested using a measurement application, and I'm not at the speeds advertised, but I'm already has 144 places in the 225 MB / s announced by Kingston. I think it's mostly in my computer that caps because it is not a recent model and that my going through a USB 3.0 PCI card added in the tower. Finally, although this is not the advertised max is still huge as transfer speed !!! FYI, I filled the 64 GB in less than 10 min. Only drawback, it is formatted in Fat 32 this factory which implies that you can not load file over 4 GB unless you reformat to NTFS or exFAT in. For my part, now it is NTFS and performance have not specifically reduced. I am very satisfied with my purchase.
