If you're stuck with a 16GB iPhone 6 or 6s, SanDisk has a solution to your storage woes. Just use that severely limited internal space for apps and games, and store all your music and videos on its new iXpand iPhone case. Yes, you read that right. The new SanDisk iXpand Memory Case is, well, a case for the iPhone 6 and 6s, but one that comes with an amount of integrated storage, helpfully expanding what's inside your handset. You can get it in 32, 64, or 128GB capacities. There's an optional 1,900 mAh add-on battery pack too, which will (obviously) improve your battery life too. The...
Source: http://www.gsmarena.com/sandisk_ixpand_is_an_iphone_case_with_up_to_128gb_of_extra_storage_builtin-news-19005.php