Off-Site File Store Inventories (Iron Mountain and TNT) a list of paper file series originating from the FSA and the number of each held in archive, as well as their function and current owner. Information on electronic file series held by the FSA can be found in the datasets ‘Electronic File Series 2004-2013’ and ‘Food Standards Agency File Plan’. A file series is a method of classifying a collection of records relating to a specific topic. The file series is allocated a prefix made up of letters.