I think what you are meant to do is use Windows File History to backup your pc to it and then you use HyperBackup on the NAS to keep snapshots of what you have backed up on the device
For photos I think they want you to use their apps to store the photos directly from your phones/idevices on the NAS and then HyperBackup keeps snapshots again
For Macs the NAS supports TimeMachine backups
Remember that if you end up with your photos only on the NAS then you either need an external USB drive to back your NAS up to or sign up to something like Amazon Glacier and let it backup itself online which is the easy way
seems to take ages to write stuff
Depends a bit on which one you have. Also if you have just dumped a lot of photos/videos on it then it can be a bit busy indexing those.