Hello,
You can use Windows 11's networked folder as a NAS by setting up a shared folder on another PC and then accessing it from your main Windows PC. You can back up your main Windows to the shared folder by using the built-in File History feature or by creating a system image backup.
As for the backup system, it depends on your specific needs and preferences. An exact sector-to-sector clone or RAID 1 can provide redundancy and ensure that your data is always available, but it may not be the most efficient or cost-effective solution. Creating a restore point or using File History can be a good option for regular backups, while a system image backup can be useful for disaster recovery. It's important to regularly test your backups to ensure that they are working properly and that you can restore your data if needed.
Regards,
Zunhui