Synchronize a local copy of a folder in owncloud

I have recently reinstalled my OS (Ubuntu) but before that, kept a copy of the "photos" folder (which I have sincronized to my owncloud server) in a partition on the hard disk.
After reinstalling the OS, I don't know how to set up the owncloud client, as I want it to have the "photos" folder syncronized as I had before reinstalling but I don't want it to perform the full download of the folder (they are lots of GB).
Is there any way to make the sync client only check for differences in the folder (checksums or so) and avoid downloading the complete photo collection again?

Thanks in advance

Hi,

there is no such functionality in the sync client yet:

If you don't have a copy of your previous state db (.csync_journal.db) of your client there is no way around the download of all files.