The installation is simple. thank you. When you don't use the conversion rack inside. You can install a 3.5-inch hard drive. When you use it. You can install two 2.5-inch hard drives. When you dismantle it. You can install a 5.25-inch optical drive. Comes with a data cable + HDD power cable Easy to install.Very convenient, If the number of displayed inventory can not satisfy your requirement. Please message to tell me the number you need. Edit photos and description is hard.Do not Copy pictures. Thank you very much Shop goods are real shot,Please rest assured to buy --------------------------------------------------- Some recent tracking number, For your reference. We only send with tracking number of the the parcel Reasonable arrangements the time. Sometimes fast, sometimes slow International transport, take some time, please be patient RC075081422CN RC583952031CN RC583952028CN RC583952014CN RC583952080CN RC583952155CN RC583952116CN RC583952204CN RC583952252CN RC583952218CN RC583952306CN RG008174943CN RG017933001CN RG008743313CN RG008743327CN EA075048903CN RG009486165CN LK100897400CN LK100971051CN LK100963673CN LN373730193CN RG013900966CN RG017934470CN RG017932995CN RG017933001CN RG017933015CN LK118090273CN EA075086393CN RG019523622CN RG019523636CN RG019523640CN LK121504032CN LK121502629CN LK121510554CN Check Web site www dot 17track dot net/index_en dot shtml ----------------------------------------------------- Attention! About shipping. Small amount. shipping through the post office. Batch (aging quickly). by. International Private Leased Circuit. or. Express transportation business. (UPS FedEx DHL TNT ETC SO FAST ...) International transport takes longer, please be patient. Currently promotional stages, do not charge fees added weight, Do not miss the chance. We only ship according to the paypal address. We only send with tracking number of the the parcel.