mophie has announced a 64GB version of its Space Pack for iPhone 5/5s. It’s available for pre-sale on mophie.com for US$249.95 and is due to ship by end of July.

The folks at mophie claim the Space pack is the world’s first smartphone case with built-in storage for iPhone 5s/5, with 2GB and 16GB models having launched earlier this year. The 64GB model not only doubles the battery of iPhone 5/5s, but increases storage capacity, allowing users to keep more documents, videos (up to 28 hours), music (up to 18,000 songs) and photos (up to 32,000) than ever before.

Available in soft touch black, the 64GB space pack uses a free iOS app — Space )(available at the Apple App Store) to access content within the Space Pack, allowing users to manage all their files via a local file management experience that doesn’t depend on network or WiFi access.