Large incremental backups

Many of my incremental backups are almost as large as the full backups when I have not added any new data to speak of. In the attached example, the last incremental is 25% of the full backup, while some are much smaller.
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I've got a related question ... I too have seen where sometimes the incremental is large next to some of the other ones (typically something like 2-5% 'normal' day-to-day, then it will bump up to 20-25%).
I've just finished re-installing ATI2015 so I could mount the backups, I was hoping I would see only the files that were actually backed up in the incrementals, but regardless of which one I mount I see the complete folder structure and all of the files???? So what am I not getting?
Thanks,
Denis.

Dennis, welcome to these public User Forums.
Sorry but there is no method of seeing just the files backed up in any incremental backup.
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Bummer, makes trying to figure out what the activity is that is causing so much data to appear new!

Defragging HDDs will cause larger incremental backups when the sector occupied by data is changed (even if the data itself has not changed); behaviour of SSDs is different - the Trim process does not change the sector in which data is located. There is limited defragmentation of SSDs but I cannot say to what extent that involves data being moved to different sectors - it may be less pronounced that is the case with HDDs.
OS updates and driver updates can also cause such bumps.
Ian
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Synology DS414 NAS 4 x 4TB WD Red HDD

it's an external drive, holds only 'user' data ... so must be something I am doing
Acronis Links : Acronis Scheduler Manager : Acronis VSS Doctor : Backup Archive Compatibility : Cleanup Tool (All versions) : Cloning Disks : Contact Acronis Support : Difference between Backup and Disk Clone : Repair program / settings
MVP Assistant (Log Viewer) latest version see pinned topic in ACPHO forum page.
MVP Custom PE Builder available from Community Tools page.
Acronis True Image User Guides available from Product Documentation page.
imTranslator for quick translation of language posts.