FYI I managed to get a 10% off voucher with this order by signing up as a new customer.
You also get 1 TB of 'hot' storage. This is an area into which you can simply drag and drop. Costs of this size of space is (at least) double this price PER YEAR with other forms of cloud backup AFAICT. This storage is a one off payment You also get 1 TB of cold storage, the main difference being that restoration is slow. Details here http://wiki.zoolz.com/what-is-the-difference-between-instant-storage-and-cold-storage/ The main problem with any form of online backup, you are limited to the speed of upload of your connection (which with ADSL is about one tenth the speed of download) Haing got it there with Zoolz, it is available to everybody, if you want, or can be password protected so that only those who know its location and password can access it (not just the two users, they can both add files and folders to either storage space)
Make sure you understand what cold storage is first. Please don't think it's exactly the same as OneDrive, Google Drive etc because it isn't.