Clonezilla

The Free and Open Source Software for Disk Imaging and Cloning
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The advanced parameters for saving mode

Select advanced parameters
Here we use the default imaging program option "-q2", since partclone supports more file systems, e.g. HFS+ (Mac OS), reiser4 and ext4.



Then keep the default extra parametrs, just press enter here:


By default, Clonezilla will split the image of partition to 4096 MB each volume, we accept that: