Before removing the key, do not forget to go to Settings and report to the disconnection request the tablet of the key.
disadvantage:
lies in the fact that one has to use the flat tablet.
remarks:
transfer speed notebook Asus -> key: ~ 4.5 MB / s
key transfer speed -> Samsung Galaxy ~ 11MB / s
key transfer speed -> (Samsung) -> microSDcard Samsung 4GB: ~ 4.5 MB / s