is there a way to save all of it from map to map

you have to manually copy it to each server's save game directory. The Mod author has attempted to make it so you can have a file cluster wide but it doesn't work on the Linux servers.

how do i manually do it?

Reward Vault Discord is probably your best place for ALL sorts of info and assistance.

There's now an optional cloud save system for the Reward Vault.

https://discord.gg/97SBJF3