Recovery Disk

[BigPapi]

So I recovered my Toshiba Laptop with my recovery disks that I made and I have 1 question. What is the 4th recovery disk for? I never got to use it, it only asked for disks 1-3. If I do need to use it how would I do that? My laptop is running well so far. Please Help!

 

[fowang]

no idea, could be extra software.