it'll take only the 10 hours again to redownload everything if there is a problem and it doesn't take up any more than 10GB of space on your drive anyway for the ones that are pruned.
You need a very fast computer to download the whole blockchain in just 10 hours.
I keep a full updated version of blockchain, it was 5 weeks to get fully download, so I prefer not to download again from "0".
Your computer must be very old if it takes 5 weeks to download.
Either that or there's quite a large problem with it.
One of mine is 7 (years old) and that predicts about a week to download the blockchain.