We were sold on the Keyport Slide when it promised not only to banish key-based clutter, but also incorporated two of our favorite things: flash storage and a beer accessdevice.
Aside from magnetic tape (which generally has a slower time to access information) there is no more cost effective storagedevice to keep all this content on than HDDs.
These issues, plus the fact that mobile devices are sometimes not able to connect and access content in the cloud, is feeding the already fast growing external storagedevice market.
Likewise Seagate has greatly improved their personal mobile wireless device, now called the Wireless Plus with up to 1 TB of storage capacity, WiFi access and reported 10 hour battery life.