M.
2 SSD Slot: Supports M Key & B+M Key M. 2 PCIe (NVMe) protocol ^^ 3.5 inch
HDD Slot: Supports a 3.5 inch HDD or a 2.5 inch HDD/SSD (thickness within 26mm) ^^ Maximum
Storage Expansion: 20TB for 2.5 inch/ 3.5 inch HDD/SSD; 8TB for M. 2 NVMe SSDs ^^ Supports data read/write for drives formatted in multiple file systems including FAT32/NTFS/EXT4/EXFAT ^^
Theoretical Transfer Rate: SATA up to 6Gbps, NVMe up to 10Gbps