A nice feature will be to have control over what files are synchronized first. I sync a lightroom catalog with one big file and a lot of other small files. My problem is that sometimes I move from my laptop to my desktop and open the unsynced big database file because my laptop is off or it was not connected to the internet enough time for the sync to complete. A lot of programs create a .lock file and checks if its there when you try to open and locks you if that file is there, lightroom also creates one but if I close the catalog on my laptop that file is deleted before the big file is synced. A solution to my problem is to have the ability to set the priority of the files that are synced. This may have many uses, sync documents before multimedia files, any many others. Thank you.