Help for Offline Pre Sync und Synthetic Full Backup needed

[uroni]

@chri.s

Now to the problems: Internet Connection is very slow as the first Server is stated on a small village.

See e.g. here: Possibility to transfer data with usb-drive? - #2 by uroni

@chri.s

The second question is: Is there a way to implement a Synthetic Full Backup and is there a best practice (if not only uncheck “Do full file backups over internet” if this is correct?)

Actually incremental file backups always are what you probably consider synthetic file backups. Insofar you can simply always run incrementals. If you have the client-side hash calculation on, files already present on the server also won’t be transferred during full file backups.