Description: The product only support read data and write data in SSD,don not support as the system startup disk. The product only support for computer model 2013-2015 Macbook Air A1466 A1465 A1502 A1398 The adapter for the interface to the interface conversion, without going through any chip, does not affect the performance of the hard disk. This product requires a higher level of professional users, non-professionals do not recommend buying / or suggest that you learn more about the relevant information before buying. Specification: 1. Please make sure the size of adapter card for your computer!Because adapter card + SSD, size is bigger than standard M.2 NGFF solid-state drives. 2. Pleae make sure the M.2 NGFF port of computer supports PCIe X4 or PCIe X2 transfer mode(The speed of SSD can reduce 50% if M.2 NGFF SSD port only supports PCIe X2 transfer mode)! 3. M.2,SATA3 4/5 and SATA Express port of the motherboard can only choose one to use,otherwise it will cause hard disk can not identify. 4. Some motherboard M.2 port transfer mode needs in the BIOS Settings,the SSD ca not identify if transfer mode error.How to enter the BIOS Settings please consult customer service of the motherboard manufacturer or query manual of motherboard. 5. Please cancel all the password of SSD before use the adapter card,otherwise it will cause hard disk can nott identify. 6. The motherboard must be Intel 7 series chipset or higher version than 7 Series chipset. 7. Mac OS and some digital camera system use disk format can't compatible with Microsoft system,new SSD if there is no partition,open the "my computer" can't see the ssd, please use the Disk Manager in Windows to delete the partitions or to create a new partition on the SSD. Package Includes: 1 Piece Adapter Card to M.2 NGFF x4