A:Answer You will only be able to replace the removable module with a 16GB module for a total of 24GB. Slot 0 is soldered to the motherboard. The 1TB SSD is PCIe NVMe 3.0 so you shouldn't have any issues upgrading to 2TB, probably even 4TB would be perfectly compatible. Note that as Gen 3 phases out, Gen 4 is still backwards compatible and will work just fine, even if not at the SSD manufacturer's advertised speed (but still as fast as Gen 3 allows).