Bob's right, it depends on what backup program you used. When you say "disk 1,2,3,4" that tells me you used the Steam backup function, which doesn't work. Hasn't worked for years.
I use an external hard drive, they are cheap, plug into USB and have software already loaded. Just copy your "steamapps" folder, and your Documents folder, if you have to reload Windows, and that's it. Copy those two folders back in, you are done! Of course, verify the RW game files. Clear blueprint cache. You should be back in the game.

Ryzen 7 2700K, Asus Prime X570P, 32Gb DDR4, 2x 1Tb M.2 SSD's, RTX2060 6Gb, Occulus Rift
Win 10 Pro 64bit, keyboard/ mouse/ wheel/ pedals/ baseball bat
Security Coordinator on the Battleship Iowa