Making Copies of a Save Slot (Copying 1 to 2) - Ezekial711/MonsterHunterWorldModding GitHub Wiki
So some people want a clean save for whatever good reason, in save slot 2, that isn't touched by progress in save 1. This is a brief overview on how to do that with hex.
1. Save unencrypted in the save editor (not over your original save)
2. Using a hex editor like HxD or 010editor the blocks are:
Slot 1: 0x003004DC - 0x003F65EB
Slot 2: 0x003F65EC - 0x004EC6FB
Slot 3: 0x004EC6FC - End of file
So if you copy the data from one block to another one, you get a clone of that slot.
3. Open the unencrypted edited save in the editor, and save (this time as encrypted).
4. Rename the new encrypted save to replace the old.