I’ve been asked several times about an alternative to Macrium Reflect Free since it is no longer free. I’ll be using it until it no longer works on my hardware.
The alternative I’ve always kept it my toolkit is Clonezilla, in fact I made a short video of Clonezilla in action over 6 years ago: Clonezilla Ain’t Hard.
Clonezilla runs off a “Live” cd or usb drive. There are 2 versions of that, alternative (dased on Debian) or alternative stable (based on Ubuntu). I recommend the alternative stable version, it probably has better hardware support.
There is also a GUI and enhanced version of Clonezilla called Rescuezilla.
Clonezilla was just updated (version 3.1.1-27/20231102).
Download
Clonezilla Live on USB flash drive or USB hard drive
How to Install Clonezilla on USB with YUMI