How do I clear my cache on a PS4/PS5?

Playstation 4

1. Turn off your PS4. It must be completely off to clear its cache. If it's left in rest mode, the process won't work.
2. While the PS4 is shutting down, its indicator light will blink. Wait until it stops blinking — that's when the PS4 is off.
3. Disconnect the PS4's power cord from the back of the console. Don't simply unplug the cord from the wall — it needs to be disconnected from the PS4 itself to clear the cache. 
4. Wait at least 30 seconds, then plug the cord back into the PS4.

Playstation 5

1. Turn off your console
   do not enter Rest Mode
2. Wait 20 seconds
3. Unplug the power cord from the back of the console
4. Wait 1-2 minutes
5. Plug the power cord back into the console
6. Turn the console back on