Note： Before you buy it, pls confirm your Macbook PRO A1708 Original SSD is Non-Touch Bar model （not 2280 length SSD）.This product is only suitable for later 2016-Mid 2017 Year macbook pro A1708 Original SSD is Non-Touch Bar model （not 2280 length SSD）.Only supports 2230/2242 type key M nvme M.2 SSD. not supports SATA protocol key B/B+M M.2 SSD.Limited by the thickness of the A1708 notebook, this riser card only supports the Key M NVME SSD with 2230 2240 length single-sided chip particles.not supports the Key M NVME SSD with 2230 2240 length both-sided chip particles.First: Before replacing the new NVME M.2 SSD, make sure to upgrade from the original computer hard disk to the version of Sierra 10.14 (or higher than version 10.14) (your computer must run 10.14 or hhigher than version 10.14 one time), and the SMC and boot ROM versions of Mac will be updated during the upgrade process to support the SSD of NVME.Second: Do not use Mac's own network recovery software to install new hard disk Mac OS, only install new hard disk through U disk. (You must use a U-disk for installation, not a Mac for network installation and system recovery. The U-disk version of the system must be 10.14 or higher, and no hard disk will be found below this version. It is recommended to download the latest version before replacing the hard disk version of the Apple system and install it on the U disk.)Third: When installing, be sure to format the disk into APFS format. If formatted as hfs, the space in the installation system interface will be unrestricted, so the disk space will be insufficient.Package includes: 1* NVMe SSD Adapter only (SSD is not included)