I made this save for when I want to replay Subnautica again but don't want to rebuild my base. This is a simple save that has a above and underwater base in one that's right there near you as you leave the life pod. It has a few new game plus items inside and outside on the platform that'll help out a tiny bit. I still want to play a survival game so no vehicles, vehicle bay, subs or anything like that but has a decent sized base and some items like the Habitat tool, repair tool, and sea glide for examples so you can have a bit more fun right out the pod! You'll need to gather stuff but you'll have a bit of storage to now so everything should be good to start off. (You start on Day 1 with everything unlocked just need to find materials to craft it all)

If you need lore then I guess this could be the lore:
Story #1:
Ryley lands on 4546B after the disaster and puts out the fire and then leaves the pod to see the Aurora in destruction. Nearby is a Alterra Research Facility built by some people who were a part of a terraforming project (what a coincidence) but things didn't go as planned hence the island Ryley discovers later on. Ryley takes shelter in it and starts to build what he needs until Alterra charges him for everything later on.

Story #2: (Lazy lore)
Like the Time Capsules maybe it was in another timeline and somehow appeared in this timeline just for Ryley to use?