Addons and maps that you download for Minecraft from an external source have a HUGE problem. They cause a data leak. Minecraft's size will continue to grow to around 7GB and the only way to fix it is to back up your worlds to somewhere and erase every file in the Minecraft folder before fully deleting the app, which is WAY harder than it should be. There are a lot of files and there is no way to tell which one it could be. I have erased every last addon I have, but if my Minecraft continues to grow again, it must be the game!