How to increase the number of triangles in my stl

[spenterA5BDY]

I have an stl I paid someone to generate. I have been trying to work with the file and discovered the triangles are to big.

Can I make them smaller so there are more of them and I can work at ahigher level of detail?

[hfcandrew]

SelectAll (ctl+A)>Edit>Remesh
https://help.autodesk.com/view/MSHMXR/2019/ENU/?guid=GUID-6EF8ABD4-AB4A-426F-A0C4-DE96FAABF520