Well, copying things over manually is very tedious, and very time-consuming. I’ve done it so many times, I’ve lost count. It takes hours… And then you have to reinstall all the applications. :O
Mac users, of course, have nothing to worry about: Apple has provided such a tool built-in to MacOS for years.
But if you’re using Windows? Well, it’s complicated. Or at least, it was complicated.
Now, this is gonna cost you a few bucks, but it’s worth every single penny…