I opted for the 64 GB version without the adapter, because I have a need for my Sony HDR-CX330 HD Flash Camcorder. The memory card is provided with a read speed of 48MB / s and write speed and 13MB / s, but unfortunately reached the card with NTFS format, the specified read speed is not because this is jediglich 20MB / sec but is for the 16 MB / s write speed slightly faster than indicated (see picture). Therefore, the card only gets 4 stars from me because the reading speed is not much promise as indicated.