There is a current technical limitation of 10 devices per operating system per account. Simply put: 10 Android, 10 Windows, and 10 iOS devices are allowed per account. This makes it one of the cheaper cloud storage options, because it allows for so many devices on one plan. Note that if you register an 11th Windows device, for example, the first one on the list is removed. So it depends on your personal needs – but it is of course possible to register all your devices!
If you wish, you can allow each of your users to back up 5 computers and 3 mobile devices using just one account – HiDrive is one of the best cloud storage providers due to its flexibility, and the fact that it offers highly secure smartphone backups, as well as PC and laptop backups, meaning that you can store all your data securely, whether for personal or professional purposes.