we work a lot with huge powerpoint presentations (>100mb) and specialized non-office file formats. Essentially our ecosystem is filebased and stored on a network drive. Having files in Teams, or sharepoint, or whatever is not a realistic option, it's just too slow.
So the way we collaborate on files is in native PowerPoint. However, I've noticed that MS Teams doesn't work well with linking in files. i.e. not at all. I do not get a link that opens the file when pasting either a mapped network drive like N:\path\file.pptx or \\network\path\file.pptx
This is essentially a show-stopper for using MS Teams for me. In conversations you can add links but only HTTP links.
Probably not the answer you want to hear but based on your current ecosystem and your needs, it does not seem that Teams are the optimal solution for you. To get the full effect of teams, the files should be stored in office 365.
Tried workarounds like tabing a page with links, onenote/ wiki and refer to that in conversation Not the optimal solution I know and not tested by me yet! As said earlier it’s built around having your files in sharepoint or also in additional cloud storage services.. Also go to uservoice and vote for better link support