If electrons flow into the first plate which makes it negatively charged, and second plate has electrons leaving it due to the buildup of electrons in the first plate repelling them. Then that second plate will be left will protons that allows electrons to buildup in the first plate due to attraction. This describes charging.
However I'm confused on whether discharging occurs when the first plate has so many electrons that it buildups a force stronger than the external force pushing electrons in there, and starts to flow the other way, and the opposite reaction that I describe above happens.
Or does is discharge when current stops flowing in a circuit or can both methods happen?
If anyone could clear this up, It'd be appreciated. Thanks :)