Backup your save file before you do anything: Type the following in the windows run dialog (Windowskey+R) to view the folder where your save game is located.
Make a copy of the folder inside you should see a folder beginning with st_<bunch of numbers here>
Your NMS save file is located in; “C:\Users\windows_username\AppData\Roaming\HelloGames\NMS”
If the No Mans sky CE (Community Event) put you in the wrong galaxy after doing the quest heres how you get yourself back to the galaxy you were in. Example I was teleported back to “Euclid” galaxy when it should have put me back in the galaxy i came from the “Budullangr”.
Save Game Editor:
You’ll need to download the No mans sky save editor from; Download here