Meet the Kingston MobileLite Wireless Pro: a battery extender and storage device for smartphones. It comes with a 6700 mAh battery that allows you to charge your phone up to 2.5 times. It also has 64 GB of storage space for movies, music, and other content. The device is compatible with iOS, Android, and Kindle devices.
MobileLite Wireless Pro lets you use flash drives or SD cards to backup your data. You will be able to access your content wirelessly. Costs under $150 at this time.