One-way folder sync is not currently supported, but we will consider it.
And UR is not able to identify files that have been moved -- you would need to update the item's URL attribute in UR (and optionally move in UR) after moving on the file system.
If you create an item in UR within a synced folder, you do need to add a URL item attribute with a value of the folder + filename of the synced file (i.e., subfolder\Item Title.rtf for a text item) to prevent another item with that URL from getting created when syncing. Another option would be to use the Item Notes pane instead of creating a separate item.
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