As consumers use their mobile devices more and more to enjoy music, television and movies, they are facing a capacity crunch as those devices quickly fill up, writes Gregory Schmidt in the New York Times. Cloud services from Apple, Amazon and others help with the storage problem, but they come with annual fees, he points out. Services from iTunes and Amazon are free for lower capacity storage, but then jump to $25 a year and up. Western Digital has introduced My Book Live, an external hard drive that creates a personal cloud for shared storage on a home network. For $180, you get a terabyte of storage capacity, and you can share files with other computers on your home network, stream media to an entertainment center, and access files on your mobile devices. It also serves as an automatic wireless backup for all computers.