AOMEI Backupper is described as 'Backup, disk cloning, system migration, and bare-metal restore for Windows PCs and Servers. Automated, selective, and encrypted backup with flexible recovery' and is a popular Disk Cloning tool in the backup & sync category. There are more than 25 alternatives to AOMEI Backupper for a variety of platforms, including Windows, Linux, Mac, FreeBSD and Self-Hosted apps. The best AOMEI Backupper alternative is Rescuezilla, which is both free and Open Source. Other great apps like AOMEI Backupper are Clonezilla, Macrium Reflect, Acronis True Image and Restic.
I've used clonezilla for years. It's never failed to backup and restore partitions or the whole disk. The cons: 1. For a person not familiar with the command line this program will be difficult to use because it's interface is text based, not GUI. 2. It doesn't backup individual files. It creates a cloned image of the partition or disk; restoration of individual files is not possible.