Question What is this port?? - HP ZBook 15 G5

Sep 11, 2023
8
1
15
There's a port on this Zbook that my brother got from his work that I can't find anything about. Too big for a microSD card. Anyone have an idea what it's for?
Picture Here (yall need to get one that will upload straight from internal storage because nothing was working and I could only upload media)