This is an SSD drive with a 1 TB storage capacity. The form factor is M.2, which allows the hard drive to connect directly to the motherboard.
From Amazon
Transcend MTE220S 1 TB NVMe PCIe Gen3 x4 M.2 2280 Internal Solid State Drive (SSD) 3D TLC NAND with DRAM Cache (TS1TMTE220S)
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