You can find the HP service manual online. I did and it VERY cumbersome, to get to the internal memory or M.2 SSD you have to use a heat gun to remove the screen (carefully) and again unglue the leather (60-90C heat gun). This is beyond the normal DIY upgrade. I was interested in upgrading the SSD; way to much effort, decided to get a SanDisk extreme 1TB, tested with system and it's still 1/2 the speed of the internal M.2 NVMe drive. Samsung X5 would be faster, but I could not justify the 3x+ cost.