SATA Version 2.0; It is mainly used for SATA (serial) hard disk data line and SATA drives as well as other SATA interface equipment; Now use upright chassis is the mainstream and inside the motherboard is vertical installation Cable without card buckle easily affected by external force caused by loose; Because hard disk is the lateral loading cable without buckle will easily loose lead to the hard disk read and write data is not normal; The cable both sides with stainless steel card buckle solve the loose problem; Hookup is actually external SATA II type specification is the industry standard interface extension of Serial ATA (SATA).