This is the ADATA LEGEND 900 PRO 2TB PCIe Gen4 x4 M.2 2280 solid state drive, a high-performance NVMe SSD built for PCIe 4.0-capable desktops and laptops that want to make full use of the faster interface rather than settling for a PCIe 3.0-limited drive. The M.2 2280 form factor is the standard 22mm-wide, 80mm-long size supported by essentially every modern motherboard and laptop NVMe slot, and running over four PCIe Gen4 lanes gives it substantially more bandwidth headroom than a PCIe Gen3 drive of similar price. At 2TB, it's aimed at gamers, content creators and power users who want fast game load times, quick large-file transfers, and snappy application/OS performance as their primary or secondary system drive. As ADATA's 'LEGEND' flagship-tier consumer NVMe line, it sits above ADATA's budget SATA and entry-level NVMe ranges, targeting buyers who specifically want to exploit a PCIe 4.0 platform's full potential rather than just needing basic extra storage.