Well, I know this question is quite strange. I have done a lot of incremental backups. Now the total file size gets too large, because there are a lot of duplicate files with similar contents, and some files are deleted. These historical versions of all files are useful, that's why I do not use
BUT I don't want that many historical backups. I just need the history of 3 months. I don't want to start a new incremental backup every 3 months, but rather pack the backups older than 3 months ago into one file each but only one backup each 3 months.
Is there anyway to do that? Or any alternative solution?