Load a old save

Hi , I got a big trouble with the editor : I got a save of my map done yesterday ( the save I want to get back ) but today when I start my level the map was like in a old save from april ( 80% of my work in the level has disappear ) so I would like to come back to the save from yesterday. I really need to know how to do that because its around of 120 hours of work erase if I can’t go back to the save !

If you go to the folder of your project, there’s a saved folder. Then you have auto saves and backup folder.
So first of all, backup the current project. (right click it and clone)
Then go to the content folder inside your project folder, navigate to where the map is saved and save that file as a backup.
Then I guess I would copy the auto saves or backup folders and back those up.
Now from the backup of the backups, pick a file that has the name of the map and modify its name so that it does no longer have the date-time and copy that to the place inside the content folder where the map name is located and replace it.
Try different files until you find one that has all the data you want.