Hello There, The card is on my Lenovo S205 notebook barely readable, let alone writable! Formatting can not. Partly also not remove. As a small SD card can then stand out negatively, I would not have thought of before. I have to also HD Tune photos posted showing the really bad characteristics. Anyway, for me it was a bad buy, because I actually have even SD cards from SanDisk and they are really good with the read / write rates, so at least they are from Windows 7 ever correctly identified without any problems!