The 64GB Mophie Space Pack for the Apple iPhone 5s and Apple iPhone 5 can now be pre-ordered from Mophie's website. Available for $249.95, the case is offered in black and is expected to start shipping on July 22nd.
To illustrate how much additional storage the Space Pack will give you, imagine 16,000 photos, 9,000 songs or 14 hours of movies. If you need more storage for your Apple iPhone 5s or Apple iPhone 5, you can't turn to a microSD slot. But you can use the Mophie Space Pack for 16GB, 32GB and now 64GB of additional memory.
source: Mophie via MacRumors