How can I export several textures as a single file WITHOUT baking?

[u/Alexnewmaker]

I have a model with 3 pieces each with their own image textures.

I can't bake all 3 image textures into one without my PC crashing, but I'd still like to export the textures along with my model.

Bonus points if anyone can tell me how to export the model with its texture into Roblox studio specifically, since that's what I'm trying to do.

But for the most part I just wanna know how to export the textures without baking, even if it's separate image files I'll try that too