These days you can never have enough storage, and keeping files in the cloud makes it very easy to access all of you stuff on multiple platforms. While there are several options for cloud storage these days, BlackBerry 10 devices have a few pre-installed, one of which is Box. There are some big advantages to using Box on your BlackBerry 10 device, including:
Integration into the Share Framework so you can easily send Box content to your contacts in Twitter, email, and BlackBerry Messenger
Quickly save to or select a file from your Box account at any time with the File Manager
Automatic backup of pictures or videos to your Box account!
As a boost to get you started, Box is offering BlackBerry 10 users 10GB accounts for free, as opposed to the normal 5GB you would get when signing up. If you're a new customer, you can head over to www.box.com/bb10 and sign up for a new account and get in on this deal automatically. If you're already a Box user, you're not left out either, as they will be bumping up accounts in the next couple of months when you log in to the app on your BlackBerry 10 device. Sweet deal, you can't beat free storage!
Source: The Box Blog
Source: (Crackberry - http://m.crackberry.com/10-10-box-giving-blackberry-10-users-10gb-storage-free)