I think saves are located in username/appdata/local/kojimaproductions/deathstranding/userid/profile
Attached a save. No idea about being shareable.
Similar issue here. On the assault rifle (I think that’s what it’s called) the ammo is spent. But on shotguns and the bola rifle the ammo doesn’t deplete.
You can use the Unlimited Crafting Materials option for that. Just set it to a high value and you can claim the materials you need from any nearby terminal. You'll still have to transport it to where you want to use them though.
Once you get Zip Lines it is easy mode. Fortunately there is an option for massive chiral bandwith, so you can build plenty of them.
I have them around the place, especially if I go back to the Windfarm area, using ziplines there is the best thing.
I do apologise, I was just responding to that comment. I'm relatively sure I attached a save to my request for infinite ammo in guns. If I didn't, I've hopefully attached another if it would help. I also don't know if saves are transferable as I've not tested it. They should go in %LOCALAPPDATA%\KojimaProductions\DeathStranding\ as others have said.