The PS5 comes with 1TB of onboard storage, but it's not super challenging to fill up the entire drive--even if you don't own a ton of games. Thankfully, a recent firmware update added support for select M.2 SSDs, so users can expand their storage space with relative ease.
This is different from Microsoft's approach with the Xbox Series X|S, which uses a proprietary storage card for internal memory expansion, courtesy of Seagate. Sony's aim is to give you more freedom to decide which drive suits
. Read more on gamespot.com