The second major PS5 system software update launches globally tomorrow along with new features on the way for PS App, the PS Remote Play app, and PS4. For more info, check out:

PlayStation Blog post: https://blog.playstation.com/2021/09/14/ps5s-september-system-software-update-launches-globally-tomorrow/
M.2 SSD installation video: https://youtu.be/jQZROCPKbYQ
M.2 SSD requirements: https://www.playstation.com/support/hardware/ps5-install-m2-ssd/