Hello and welcome, new and returning Sims 2 players. My name is Scribal_Goddess, but you can call me Scribbles, and I’ve been playing The Sims 2 regularly for over a decade. In my time, I have fried at least five neighborhoods, and accumulated a lot of knowledge about how to prevent that from happening, which I realize a lot of you might not have after the death of many sims 2 communities. There have been a lot of threads I’ve seen just lately where people have inadvertently destroyed their hard work, so buckle in and I’ll teach you about avoiding corruption. I have personally playtested all mods mentioned as potential tools, in some cases for over five years.
A more technical rundown can be found here, but I'll try to explain things in simple terms that will hopefully be more useful in understanding the hows and whys of corruption and game files. Initially, I have three lessons for you, but watch this space in case I see the need for more.