PS5 can read PS4 discs, backwards compatibility for all but 10

Sony has finally explained how the PS5’s backwards compatibility works and how you can upgrade select PS4 games to next gen.

PS5 Backward Compatibility Further Detailed, Unsupported PS4 Games Listed

Can I play my PS4 games on PS5?

The PS5 is supposed to be backward compatible, but it is not reading my PS4 games discs. What could be the issue? - Quora

PS5 details confirmed: 8K, backwards compatibility, SSD, ray tracing and more

Can You Play PS4 Games on PS5? Here's the answer!

How To Play PS1 PS2 PS3 Games On PlayStation 5 - PS5 Backwards Compatibility Guide.

Full PS5 Backwards Compatibility with PS4, PS3, PS2, and PS1 Games Hinted At By Ubisoft

Best PS4 games to play on PS5: 10 titles you need to revisit on PlayStation 5

Why You Should Buy A PS3 (Backwards Compatible) With A PS5

PS4 Backwards Compatibility: Can You Play PS1, PS2, and PS3 Games on PS4?

Is PS5 Backward Compatible? Yes, With a Few Exceptions

PS5 backward compatibility: PS4 games list, USB external drive support - Polygon