In principle the memory card meets the requirements placed on them, the (fast) storing 64GB of data. But- for the intended use in a Nikon D800, which is after all SDXC-compatible, it is not to be used because they wird.Warum not recognized by the camera whatsoever. Even on a JVC HD video camera they failed their service as it is but to the camera. As it turned out, this model is not SDXC-compatible. So before the device Check this suitability, whether it can deal with this new standard. Furthermore, I told my laptop (HP Pavilion dv7 Win 7 64bit) Whenever you put in the internal card slot, which he wants to format it. An external Card reader, however, it works without any complaints. Also on the PC it is running without any problems and will be immediately recognized as a drive. So overall a product with "hooks and eyes" - therefore only 3 star. But the price is at least good and who wants to use them only as a data store, so has "1st choice" or "Preistip".