Hey, I can answer some of these. A new power cord can be bought from Purism directly. More memory will have to be purchased from a third party and needs to be DDR4 at 2133 MHz. You can upgrade the memory up to 16GB. A secondary harddrive, or, in the case of the Librem, an added on M.2/NVMe SSD can be added easily with a needed screw. If you want to replace the SSD that comes with the laptop you could easily add any 2.5" SATA SSD you want. All of this can be done (except the power cord) with a screwdriver.