How to upgrade the SSD in the Surface Laptop 3 or Surface Pro X - OnMSFT.com
Amazon.com : Microsoft Surface 3 10.8-inch FHD Full HD(1920x1280) Touchscreen 2-in-1 Education and Business Laptop Tablet (Intel Quad-Core Atom x7-Z8700, 4GB RAM, 64GB SS Mini DP, Webcam, Windows 10 Pro (Renewed) :
Microsoft Surface Pro 3 Tablet Computer with Keyboard - Intel Core i3-4020Y 1.5GHz, 4GB RAM, 64GB SSD, 12-inch Display, Windows 10 Pro - Used Grade B - Walmart.com
Can you upgrade RAM on Surface Pro 4? - SurfaceTip
The Surface Pro X and Surface Laptop 3 are upgradable, but only a little - The Verge
Amazon.com: Microsoft Surface Book 3 (SMP-00001) | 15in (3240 x 2160) Touch-Screen | Intel Core i7 Processor | 32GB RAM | 512TB SSD Storage | Windows 10 Pro | GeForce GTX 1660 GPU : Electronics
Microsoft: Surface lacks upgradeable RAM and Thunderbolt because of security | ZDNET
Can you add RAM to Surface Book 3? - SurfaceTip
Can you upgrade Surface Laptop 3 SSD? - SurfaceTip
Surface Pro 2: It's TOOL-PROOF and ultimately destined for LANDFILL • The Register