Say the folders to which the selected item belongs

Hello,
sometimes doing clean-up of my references I find two duplicates,
then I don't know which one to delete because I don't know to which folders
each belongs and I don't want to remove the reference from those folders.

Can you add an information field which says the folders that contain the selected item? I would imagine something like the "Tag" tab, but for folders (that in zotero are more like google's tags).

Thank you in advance,
Giancarlo

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