Differential backups
Please add differential backups.

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Nicola Stefanac commented
Hey guys, any updates?
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Nicola Stefanac commented
Incremental backups are not safe if one backup in the chain is broken the backup can not be restored. Differential backups are much safer and are a sweet spot between incremental and full backups. Please implement this feature!
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Giovanni commented
I am using a pair of bash scripts I have created years ago in order to create a differential backup, keeping all history up to certain limits, and people continue to ask for it, even for Plesk installations.
Now that I have Plesk myself, I am facing the problem that backups are always complete and do not reflect changes in an easy way. With sites generating each backup several GB, this is a big problem. Also, when making cross server backups, they generate too much traffic.
A differential backup just has one good copy and the differences, and those are tolerable sizes even for huge sites.
I am willing to give you the scripts to look through and I eventually will make a version which works for Plesk based on the ideas we may have come up with.