What is the difference between File to Backup and File to Backup Pro? Our backup accounts come with unlimited online storage. Unlimited storage space means that you can put as much as you want on your File to Backup without worrying about it – and can therefore backup your entire PC, no matter how much stuff you have on it. Many of our customers store hundreds of gigabytes, some store over a terabyte. We don’t limit the amount you backup, nor do we limit the amount you upload or download to the File to Backup servers (the bandwidth). You really can use File to Backup as much as you want.