Lenovo ThinkPad E590 - disassembly and upgrade options - YouTube
Lenovo ThinkPad P14s Gen1 Home and Business Laptop (Intel i7-10510U 4-Core, 24GB RAM, 1TB m.2 SATA SSD, NVIDIA Quadro P520, 14.0" Full HD (1920x1080), WiFi, Bluetooth, Webcam, Win 10 Pro) with Hub :
upgrade-RAM-memory-and-SSD-storage-on-thinkpad-E480 - English Community - LENOVO COMMUNITY