Incremental backups not working correctly and How to delete older backups
I am doing backups to a 4 TB external drive. I am using the Incremental scheme, set to create a full version after every 5 incremental versions. I am backing up daily at 4:00 AM. I have been backing up for about two weeks.
The first three backups seemed to be full backups. After that they have been smaller, with each 5th backup somewhat larger than the in-between backups but nowhere near as large as the first 3 backups.
Example: The first 3 averaged 300-400 Gb, the rest are around 300Mb. If 300-400 Gb is a full backup, I am not getting a full backup every 5th time. What is wrong?
Also, can I set up Acronis to automatically delete the older backups, or do I have to do that manually?
After only 2 weeks I have already used about 1/3 of my 4TB drive. At this rate I will fill it soon, unless I delete some of the older backups.

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