Update mode keeps re-adding deleted files

[lantiantiger]

Hi all,
I've been using freefilesync for a couple years now, and recently encountered a situation while trying to use the Update synchronization mode. I have folder A on the left as the source, then folder B on the right. After the file is copied to folder B, a separate program deletes the file. However, instead of FFS remembering that this file was previously synced to folder B, it copies the file again. How do I set it up so FFS only adds new files to folder B?

Looking through the forum, the I found this thread from 2010 similar to what I'm asking for: viewtopic.php?t=2077

Thanks!

[xCSxXenon]

It is not, easily, currently possible. You could hack together a setup using time span(s) and scheduled syncs. If you sync once a day and only sync the files created or modified in the last day, you won't haves files synced twice, unless they are updated of course.

[lantiantiger]

Thank you for your reply. Do you have any other suggestions? The time span/scheduled syncs sounds like it could have reliability issues. Maybe another program that would work better?

[Plerry]

"After the file is copied to folder B, a separate program deletes the file."
If those files are going to get deleted (from B) by a separate program anyway, why sync them to B in the first place?
Assuming only specific (and not all) files on B get deleted by this separate program, you could exclude those files from the sync via the Exclude Filter, provided that you can identify unique common characteristics of those specific files (file-names, -extensions or -location).

[lantiantiger]

The separate program is a cloud uploader. I keep A as my local backup, and use B as my temp folder. Since all files in B get processed then deleted, unfortunately the Exclude filter won't work for my use chase. Thanks anyway.