I have to say, KSP's "save game" system does take a little bit of work to understand it. You have "master" game saves, then within each of those you can have a "subfolder" quicksave, BUT still, even under that, you can have a lot of "quicksaves" within the "quicksave", so that's where my confusion was when I first started playing the game. It is quite obvious now, but much like getting into orbit, it'll become second nature once the light bulb comes on. I got worried i was going to lose my progress at almost every game session, so I started a bazillion "quicksaves" within my game, and about a billion gazillion "F5" quicksaves in those quicksaves. I was gonna make sure I had it----lol now, i understand and don't do it quite as much anymore...