Chose the 8GB model to install "permanently" to the USB connection of my car stereo (Ford Focus 2012). The write speed is limited in this use no problem. It contains a lot of my disco, digitized ogg.
Seems less appropriate to transfer files daily, the risk of being in a washing machine too lost in lining or other risk of loss as well (key or cap), well of course, with a key size of a USB connector .. .