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
HDD/SSD mounting set 2.5 auf 3.5 for Lenovo Legion T530-28ICB (90JL/90JU/90L3/90L4) - sparepartworld.com
Legion Y530: Adding a HDD afterwards - LenardGunda.com
How to upgrade the HDD in your Lenovo Legion Y740 | Windows Central
I'm trying to install a 2nd ssd on my lenovo legion 5 : r/LenovoLegion
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