Tip for single players to avoid losing saves after crashing

I figured it was fitting to put this in the bug section. I lost 2 game saves in single player after building huge bases so I started thinking how I could prevent this. What I do is make a backup copy of my game save on a usb drive. I almost lost my third game after building this huge castle but I was able to delete that save and copy my backup back to my PS4 and I can confirm I got right back in. May work online too but Im not sure. Hope this helps somebody. This is what I almost lost for the 3rd time