I set up an rysnc job for 12 GB worth of photos. It ran for a couple of days (~10GB copied) and then the connection errored out.
When I restarted it, it began copying all files again, somehow not recognizing the previous upload. I stopped the process and then restarted, and it skipped past the few files that were re-uploaded (as expected) but continued with the copying of files there were uploaded just a couple of days ago (no changes made).
Any thoughts on how to get rsync to recognize that there is 10GB worth of files that don't need to be re-sent?