Please sign in to your Ancestry account. As soon as you log in to your tree. Then, You should select the tree you want to download and then click on the tree. When you click on the name, you will see the options below.
Tree Overview Media Gallery Tree Settings Sharing
After you click on tree settings, you will get another window if you look left at the bottom corner of the hand side. In addition, you will find an option Export Tree. When you click Export Tree, Ancestry creates a Gedcom file for you to download. Read full blog: Download trees from ancestry
