Dropbox has mobile apps for various platforms like Android, Apple, Windows and Blackberry. The Dropbox mobile app can save and backup as many files as your mobile can hold or Dropbox space allows. If your mobile device is running out of space, then remove photos, videos or files that you have made available offline to free up space on your mobile device. If your Dropbox account is running out of space, then you can delete your photos, videos and files from your Dropbox account or upgrade your Dropbox account. Dropbox offers 2 GB of free storage space to all its users. You can upgrade you free account to paid monthly subscription plan. It offers 1 TB of space for $9.99/month and as much storage as you need for $15 per user per month for Dropbox Business user.