Sparrow wallet is not something that you will lose when something happens to your computing machine. It is not the Sparrow wallet that holds your Bitcoin it is the Bitcoin network that holds your Bitcoin. Which is why you don't really need to worry about your "set-up". It is not your " set-up" that holds your Bitcoin. Again it is the Bitcoin Network. The only reason you need to keep your private keys is the fact that someone who pretends not to know anything about Bitcoin happens to be your friend and he or she is loitering around your loft. Trying to see if you are careless.