If you’re one of the many who values phone storage and upset over the disappearing microSD card slots, SanDisk may have a viable alternative for you.  They have just reinvented the flash drive, that works in our wireless era.
The SanDisk Connect Wireless Stick comes in 4 different capacities, starting at 16GB and doubling up to 128GB.  Prices range from $30-$100, respectively.  It communicates with any Wifi-enabled device via 802.11 b/g/n connectivity (up to three devices simultaneously), but can also plug in a USB port the traditional way.
The Connect Wireless Stick of course has a battery, which is rated to support a ‘single stream’ of transfer for up to 4.5 hours on a single charge.  To manage all the content zipping around, SanDisk has developed a Connect app, compatible with Android, iOS, Mac, and PC platforms.  You can find the Connect Wireless Stick right now on Amazon or Best Buy.
Are you open to this solution for your deteriorating on-board storage space?  I can see it being a double-edge sword.  It’s super nice that you can access files and media from a distance, but what if you forgot to charge it?  Also, it’s another device that you have to remember to carry around.