The only answer in the "man filesync"
If you delete the files from your notebook, filesync will
want to perform the corresponding deletes on the server,
which would not be what you wanted. Rather, you would like a
way to tell filesync to stop synchronizing some of the
files. There are two ways to do this:
1. Edit $HOME/.packingrules. Delete the rules for the files
that you want to delete.
2. Delete $HOME/.packingrules. Use the filesync command to
specify the files that you want synchronized.
Either way works, and you can choose the one that seems
easiest to you. For minor changes, it is probably easier to
just edit $HOME/.packingrules. For major changes it is prob-
ably easier to start from scratch.
Once filesync is no longer synchronizing a set of files,
you can delete them from your notebook without having any
effect on the server.