There are 4 models optional,ngff protocol case is not compatible with nvme protocol ssd,vice versa. please confirm your m.2 ssd protocol before ordering. (1) 10gbps nvme model: only support nvme pci-e protocol m key/m+b key ssd, with 50cm type-c to type-c cable. (2) nvme model with 2 cables: only support nvme pci-e protocol m key/m+b key ssd, with 50cm type-c to type-c cable and type-c to usb 3.0 cable. (3) 5gbps ngff model: only support ngff sata protocol b key/m+b key ssd, with 50cm type-c to usb 3.0 cable. (4) ngff model with 2 cables: only support ngff sata protocol b key/m+b key ssd, with 50cm type-c to usb 3.0 cable and type-c male to usb 3.0 female adapter. warm reminder - m.2 ssd is not included. - nvme-model case is not compatible with ngff sata m.2 ssd, vice versa. - it is normal that the aluminum case heats up when using, and