I'm buying a roamio and am going to sell my premiere XL4 with lifetime subscription. Is there anything i need to do to delete stuff on hard drive or just leave it as is? Also can anyone get my account info from tivo if they have the unit? Do I deactivate it from my account or does it need to stay on it for lifetime to work with new owner? Sorry for all the questions. Never did this before and usually just pass my old electronics to my kids but they both have directv. Thanks for your help. Have learned a lot of stuff on this site.