A:AnswereMMC is storage that is a part of the motherboard, it is soldered to the motherboard and not removable. This unit does also have an M.2 slot for upgrading your storage
A:AnswerThere is an app in the Microsoft store that you can get that is used to switch out of S-Mode, but if you do this you cannot go back to S-Mode so make sure it is what you want to do. See more info here: https://support.microsoft.com/en-us/windows/switching-out-of-s-mode-in-windows-4f56d9be-99ec-6983-119f-031bfb28a307
A:AnswerYes, while you cannot remove the 64gb built in storage (eMMC) that the unit comes with, there is an M.2 slot to add an SSD for upgraded storage
A:AnswerYou can upgrade the RAM but there are limitations on how much the motherboard supports (I believe 8gb) and there is only 1 slot for RAM on the motherboard