That depends. If you use purchase the personal or family plan, sadly the answer is no. RossBackup only backs up your computer - if you remove or delete information from your computer, RossBackup will do the same. In other words, if you delete a video from your computer, RossBackup will hold on to it for 30 days (in case it was deleted by accident) and then will delete it as well.
However, if you go with the VIP, you can easily free up space. All you need to do, is copy the data to your VIP drive, and then click the "Store only online" button. The VIP package can do so much more! From sharing files to syncing to all your computers, it's the ultimate in computer backup.