Per Seagate, the PlayStation 5 is designed to play PS5 games only from its internal NVMe SSD, not an external SSD or hard drive, though you can play PS4 games on a PS5 from an external drive.

Expand your PS5 storage with these 2TB Corsair and Seagate internal SSDs and save between $60 and $75 on extra bytes!

However, it's worth knowing that you can't load PS5 games off of external drives, even when it comes to the official ones. You can store game files on there, and back up your screenshots and video ...