What are the backup algorithms?

[paolosezart]

I read the description, but I still did not understand how to configure the backup algorithm. For example, the scenario of creating a full backup on the first of every month, every Sunday, or the first of every month.
How can I configure that only modified files and folders are backed up between full backups?

[out-of-heap-space]

For my understanding it is like a incremental forever. The last "Snap" is the latest Full. Check also this link: https://kopia.discourse.group/t/retention-policies-documentation/2488