Sony memory sticks re detachable. Since the first version of its memory stick Sony has brought about many improvised versions. For memory sticks the quality parameters are storage space and file transfer speed which is usually from a digital device to a personal computer ir MAC. The first version of original memory sticks was available in sizes varying up to 128 Mega Bytes. A sub version allows two repositories with 128 MB capacity on the same stick. Recently, at a show in Las Vegas a staggering 8GB card was first launched by Sony.