Tsm file extension

Doesn’t exist for me when I select export? A prototype company wants me to use Fusion 360 but I can’t seem to get my model into it.

I’m not a Fusion user, but what i know is that, if you’re online, and by using the Data Panel, you can

Bring many types of formats into Fusion, including .3dm files.

So maybe this is what you’re looking for.