Replying to
@palmin Great stuff! Some questions: should it be enabled on only one device for the same source → destination or can it be enabled from multiple?
Which version of the photo does it backup? Since Apple Photos edit are non destructive, the edits are in a separate file.
So you recommend a solution (S3-like vs FTPS vs SFTP)? Which one is better for backup speed and which is faster to browse?