It’d be nice if there was a feature to set an automatic backup of the whole My Cloud Home to an USB hard disk - for example, I would set it to back up the data once a week and it would be way better than doing it manually every time.
EDIT: I managed to work my way around this by using a spare laptop.
I installed an app called Cobian Backup, which I set up to make a mirror backup of the my cloud home onto a HDD every Sunday at midnight. I set up an event that makes the laptop go to sleep once the backup is finished. I also used Task Scheduler to wake up the laptop and restart it before the backup (so it’s not slow). So far it has been working very well.