Telstra asked me to pass on an offer that they have for all Telstra clients, and that is 200GB free of cloud storage on OneDrive for all Telstra clients. Which is enough for backing up your point of sale backup.
Overall there are three main suppliers of cloud storage which my clients use OneDrive, which is this one, Dropbox or Google Drive. I would say for ease of use, nothing is as easy to use as Dropbox which is the reason it comes with the biggest price. It does have one problem that if you do not use the Dropbox account for six months, they will delete your account, and you will never get your information back. Google Drive and OneDrive, I rate about the same, mainly because OneDrive is a lot better than it used to be. Furthermore, OneDrive is very good if you use Microsoft Office.