The on-prem starage solutions is definately the most exciting for me, my current NAS is no longer able to update and I can't upgrade the OS as it is no longer a supported model. Will have to replace it soon.
C2 Password
Store all your passwords and sensitive data in one secure location. I now have so many different passwords that I keep on scraps of paper that this service would be very useful.
C2 Backup
Back up all your Windows devices to the cloud and never lose data. Unfortunately I have lost a lot of important data over the years due to inadequate backup measures. It would be very useful to have a simple and secure cloud backup service to prevent any avoidable future data loss.