Talk:Device Transfer/@comment-31716725-20180917113222/@comment-31716725-20180919110619

Depends.

For example your phone broke but the data is still up and you transfer the data to another phone temprary.

Later after it fixed you return back but you need to redownload it back.

I felt like the user data binded  and wrote to the game data which cannot erased manually or automatically, hence they came up with the idea deleting all the downloadable data (excluding the base apps).

Its kinda stupid.

Also, if that FGO already 100% downloaded and also have an active account but doesnt issue transfer number yet, You CANNOT TRANSFER ANY ID until you issue that active account.

You dont need to redownload though unless that phone already have an old id that issues a transfer which give a warnings.