The PlayStation 5 takes a PCIe 4.0 (Gen4) M.2 NVMe SSD in its internal expansion slot, and Sony recommends a sequential read speed of at least 5,500MB/s so games stream as fast as they do from the built-in drive. A heatsink is required to stop thermal throttling during long sessions, so the simplest choice is a drive that ships with one pre-fitted, such as the WD Black SN850X, Samsung 990 Pro or Seagate FireCuda 530. Most PS5 drives are the M.2 2280 size; 1TB suits 5–10 large titles while 2TB and up covers a heavy library. Fitting one takes a few minutes with a single screwdriver, then the PS5 formats it on first boot. Compare capacity, sustained speed and local warranty below to pick the right drive for your setup.