Download File Once Deleted

I'm pretty sure that Aternos servers delete after 3 months of not playing, but since I have a lot of servers, it's not easy to play in all of them within 3 months especially when you slowly get bored. I'm pretty sure this is possible to do but basically, what if when you delete the server, you leave a download file before you delete the world. This will help out newer users like me, who didn't expect my old survival world to get deleted once i stopped playing. It was my first survival world, and it was very sad that I couldn't get it back. This would be nice, so if someone stops playing minecraft for a bit they can still get the world back, plus this way, I don't think it'll interrupt with the storage of all the servers ( If it does, then sorry for wasting your time suggesting it lol ).