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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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A differential backup saves only the changes made since the last full backup of the same type found in the target folder for the backup.
An incremental backup saves only the changes made since the last backup of the same type found in the target folder for the backup.
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