This is an SSD drive with a 250 GB storage capacity. The form factor is M.2, which is the most efficient form factor.
From Amazon
PNY CS1030 250GB M.2 NVMe PCIe Gen3 x4, 2500MB/s Read Speed, 1100MB/s Write Speed Internal Solid State Drive (SSD)
Aimact
PNY CS1030 M.2 NVMe 250 GB PCI Express 3.0