It's not your normal storage device, but I got one... and it's super rad!! Makes any wi-fi enabled device have 200GB of extra storage!
It emits it's own little hot spot (will last like 5-6 hours or more), you connect with your phone, tablet or whatever else and you can stream mp3 straight from it! It also can stream video and pictures etc, but I don't really bother with any of that noise. I use an old iPhone 5s (was 16GB, is now 216GB) for an ipod. The sandisk app for the device is available for both android and ios too. The only problem is the app is slightly buggy depending on your version of iOS or android.
Not to mention its a 200GB flash drive for less than $80. I was skeptical at first, but I absolutely love this thing!
Besides a slightly buggy app, the only other problem I have with it is not compatible with lossless files, but for me it's no big deal cause it's my "on the go" storage device.