Why can't I see the SSD when trying to install Ubuntu?

Question

System administration

I purchased Lenovo Y730 with SSD and HDD. Already have Windows 10 on board.
The goal is to make a dual boot with Windows and Ubuntu.
I partitioned the main SSD into sections using the Windows disk management system. It would seem that everything is buzzing, but when I try to install ubuntu, I don’t see any partitions with SSD at all, and what’s the strangest thing, I don’t see the SSD either. HDD I see everything is OK, but there is no SSD.
what to do? tell me plz.