It’s 2 4 gb sticks and so I’d have to hope that it supports 16 gb of ddr3.
As for the ssd, that’s in the cards eventually. But since it’s an aio Pc, it’s an utter pain to work on
It’s actually not shit for a hdd which confuses me. It’s just an Hitachi Travelstar hdd. I’ve used faster (on paper) machines that don’t feel as responsive as that computer.
Make sure the seals are good and the vent is clean. I’m used to indian pressure cookers where the weight is removable. I’d recommend buying a replacement safety valve. They’re pretty cheap