Lenovo IdeaPad 330 & 340 - SSD and Ram Upgrade and Replacements Guide - YouTube
Ideapad-330-15IKB-Type-81DE014GJP-got-full-size-M2-SSD-slot - English Community - LENOVO COMMUNITY
Yes, Legion 5 Pro has two NVMe PCIe 3.0 2280 SSD slots, the second slot is empty and has a pre-installed heatsink with a thermal pad. (I installed Samsung 970 Evo 1TB