Board Thread:Destiny Forum/@comment-24306135-20140420221422/@comment-24057866-20150630145951

121.45.129.104 wrote: After reading multiple conflicting articles, & reading the back of the game case before opening it, I have found that it won't even Finnish installing the game. It wants to download 800mb from the XBox game store during the install, which it will not download. I have an Internet connection, but not a gold membership. There goes my money.....no returns and no game to play. You can still download the game without a Gold membership. Gold isn't required to play story missions, it's just required to do Strikes, Crucible, and other multiplayer activities. You only need a Silver membership, which is free.

You'll want to troubleshoot this like any other content failing to download from Xbox Live. See here for Xbox 360 or here for Xbox One.