256GB SK Hynix HFM256GDJTNG-8310A PCIe Gen 3 NVME m.2 2280 6Gb/s SSD DriveNOTICE TO BUYERS:All SSD's come unpartitioned and unformatted. Please follow the format procedure.If you use it as primary disk and are installing Windows on it it will get formatted automatically as part of installation procedure.If you use it as a secondary disk on a computer which already has Windows or via external USB device you will have to connect it to an available m.2 port inside your computer (not via USB) and make sure it's detected correctly in your computer's bios then boot Windows from your boot device and go tocontrol panel - administrative tools - computer management - storage - disk management. Inside disk management section the new hard drive will come up as blank. You will need to right mouse click on it and choose to create a new drive letter and tick quick format box. After done the disk will be visible and accessible by Windows or can be used via external USB device