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Backups are grouped into 'Sets'. A backup set contains first a Full backup and subsequent linked incremental and differential backups. This is sometimes referred to as a Backup Chain. You can see the links by looking at the default file name which is a unique backup set identifier, followed by a number pair:
The above folder contents shows (marked in red) a single backup set {4F6F6CACA58B077D} which contains a full image and 4 increments. The end of the image file contains a number pair? 'xx-yy.mrimg'
'xx' is the increment number.
00 - Full image
01 - first incremental/differential
02 - Second incremental/differential
'yy' is the file number and is always sequential. 00, 01, 02, 03... . This will be different to the increment number only if files have been split. This can happen if files larger than 4GB are saved to a FAT32 file system or you are saving an image to multiple DVDs.
So the first file for a full image always ends with '00-00.mrimg'.
Note: The Image ID, file and increment numbers are also stored as data inside the files. Renaming a file does not affect the integrity of the set, Macrium Reflects ability to append to the set, or restoration of the files.
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