Once you opened the back cover, it is a good idea to upgrade the RAM or the SSD if you want.

This laptops has 4 DIMM slots. 2 in the back and 2 behind the keyboard.

Also 2 m.2 SSD slots: 1 in the back and 1 behind the keyboard. As well as a full size laptop SSD in the back, behind the battery.

It is also recommended to use compressed air to remove any dust in the laptop and the fans.