Hi @AnnaWing, currently it wouldn't be possible to log this since opening a folder isn't the same as opening a file.
It is essentially the same as navigating down the file structure, and at the end you pick a file to view.
It would also create hundreds of log entries daily when users search for files in their Dropbox account, and would only work from the website (since these folder accesses might not be tracked from Explorer/Finder).
Could you clarify how this would be useful for your workflow?