Q: My sister and I have shared an iTunes Store account up until now, but due to iCloud we would like to switch and use different accounts. If I make a new account, will all my purchases made by the old one disappear from my iTunes? - Izzy A: For locally stored content, the answer is basically no. Anything already in your iTunes library or on any of your iOS devices will continue to be available regardless of which iTunes Store account you are signed…