Just purchased an Asus J1400K. According to specs https://www.asus.com/ca-en/laptops/for-home/vivobook/vivobook-go-14-flip-j1400/techspec/, I can't add RAM (4Gigs onboard), but it does have an expansion slot (1x M.2 2280 PCIe 3.0x4). Do I bother cracking this thing open?