Using MySQL saving is fairly simple, but you will need a module before hand.
1) If your host does not have MySQLoo9 downloadable from their control panel, download it at the following URL and follow the instructions: https://github.com/FredyH/MySQLOO/releases
2) Navigate to the following directory: lua/wos/charsys/config/sv_config.lua
3) Enable the UseMySQL in the config. The code is as follows:
wOS.CharSys.Config.UseMySQL = true
4) Configure your login credentials in the block that follows that entry. The code is as follows:
--The MySQL connection info. If you aren't using it, don't worry about it
wOS.CharSys.Config.Host = "localhost" --Your database server ip, or localhost if on the same PC
wOS.CharSys.Config.Port = 3306 --The port of your database server
wOS.CharSys.Config.Username = "root" --The username to login to the database server
wOS.CharSys.Config.Password = "" --The password to login to the database server
wOS.CharSys.Config.Database = "wos-charsys" --The name of the database you want to use
wOS.CharSys.Config.Socket = "" --The socket. If you don't know what this is, you don't need it. Leave it blank.
You should be all set after that! If you experience any issues, ensure you have all required modules and that your database allows external connections if not on the same PC.