A:Answer I answered this question already, but I have upgraded my second unit and have more info to report. I removed the motherboard to add an 8GB Crucial SODIMM to upgrade the memory to 16GB. I also added a 2.5" Samsung 1TB SSD into the empty SATA port. I reassembled the unit and powered up. Everything worked great, but only when the AC adapter was plugged in. If I unplugged it, the screen started flickering, making the laptop unusable. I reopened the unit and removed the original m.2 SSD, and again reassembled. The flickering problem is now gone when running on battery. I guess the battery is not strong enough to power the extra memory and two SSD's simultaneously. My other unit has two SSD's, but no added memory, and it also has no problems when running on battery. So, when upgrading this laptop, you will only be able to use one SSD if you upgrade your RAM.