Can you back up or store your eBay store listings offline?

Try using Turbo Lister. Yes, you can work while offline but you cannot list and upload listing while offline. It's a free listing tool for seller's. Go to seller tools under subscriptions and click on Download Turbo Lister. You can store your listings and use them another time. You can make your own templates and choose a different one when you need it. Make sure you backup first then do the updates after you have downloaded Turbo Lister and have it set up.