This property determines whether an
Instance|object should be included when the game is published or saved, or when
Instance/Clone is called on one of the object’s ancestors. Calling Clone directly on an object will return nil if the cloned object is not archivable. Copying an object in Studio (using the ‘Duplicate’ or ‘Copy’ options) will ignore the Archivable property and set Archivable to true for the copy.
local part = Instance.new("Part") print(part:Clone()) --> Part part.Archivable = false print(part:Clone()) --> nil