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To delete a folder data source, I would go to Home on the ribbon then Transform data > Transform data to load the Power Query Editor. Then on the left hand side, in the Queries pane, right click the appropriate query groups and choose Delete Group. Since it's a folder data source, you'll probably need to delete the main query folder and also the Transform File group.
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Xiaoxin Sheng
To delete a folder data source, I would go to Home on the ribbon then Transform data > Transform data to load the Power Query Editor. Then on the left hand side, in the Queries pane, right click the appropriate query groups and choose Delete Group. Since it's a folder data source, you'll probably need to delete the main query folder and also the Transform File group.
