What is the best backup plan?

I would have recommended Comet Backup as a back-up solution. However they have announced on the 29th of April a massive price increase of 99.00 USD (single node) or 199.00 USD (2 or more nodes) a month! This used to be only 2.00 USD per device. But now it will be 101.00 USD or 201.00 USD. Really insane. But a single or more personal solution would be getting a Synology device or QNAP. I personally also a Synology. And you can sync everything (in certain folders). Works great. And you can also create backups ofcourse. At my office computer I use Acronis to sync all my data on a daily basis. Hope this helps!

I am a backup freak, I have a local QNAP drive + I backup to the cloud. I do integrity checks as well.