BMW Diagnostic Scanner With OPS Multiplexer

80GB BMW Diagnostic Scanner With OPS Multiplexer / OBD-II Cable 1) DIS V57: English, German, Japanese. 2) SSS V39: German, French, Spanish, Italian, Netherland, Swedish, Japan, Chinese, Korean, Thai, Taiwan, Russian, Indonesian, Turkish, Greek, Portugese; Two version hard disk for this product: 1.Hard disk fit IBM T30 2.Hard disk fit all laptops What is the difference between this two hard disks? The first one hard disk fit IBM T30,that means this hard disk only can used on