According to my informations, there is a M.2 SSD and a 2.5" HDD installed. You may chose any appropriate parts to upgrade it. SSD needs to be in M.2 2280 Format. The HDD needs to be in 2.5" Format. I don't really see a point upgrading RAM. But if you chose to upgrade it, you would need DDR4-RAM, 2'400 MHz, SO-DIMM 260 Pins, Non-ECC.