Cloud backup is a common solution for home users to actually have backups of their data. There are a huge number of options in this space if you use Windows or MacOS, all running about $6/month per computer, or pay for storage used. However, most cloud providers only offer “enterprise” storage if you happen to use Linux. This is often pay per GB per month, with charges for download, and often is strictly storage space via an API or CLI offering. i.e. it’s a building block, but not the whole shebang. The other thing to keep in mind is how sensitive your backups are – many cloud vendors do encrypt data, but very few do so in a “zero knowledge” end to end method and at rest. What this means in practice is that while your backup data is private while being backed up, the cloud vendor can look at your files if they want to for any reason. Many, like Google, use photos to train face detect AIs for instance.
If you know me, you know I tend to prefer to get what I pay for and only what I pay for – so less advertising, or AI training, or really anyone but people I explicitly select having access to my files, let alone backups is preferable.