Solved! SSD

[ToshP]

what ssd is compatible with acer nitro 5 an515-52
pic of the slot: https://drive.google.com/file/d/1o-z4NxQTs0810lZUEU7ppNxPIUKG2-Ut/view?usp=sharing

 

[hang-the-9]

M.2, seems like either an nvme or a SATA one would work there.

 

[mrmike16]

It works with both an NVME SSD and a 2.5 SSD or HDD - Acer Nitro 5 AN515-52 (NVME M.2 SSD compatibility and Windows 10 migration/reinstallation) — Acer Community