A STORAGE SYSTEM

A storage system adapted to be attached to an inner surface of a cargo or back space of a service vehicle. The storage system comprises at least one elongated fastening rail for fastening a module unit via a bracket. The bracket comprising a guide portion and through-hole through a central body portion of said bracket. There is further a securing element to attach said bracket to said elongated fastening rail. The guide portion prevents rotation of the bracket and the securing element is adapted to secure said bracket to said elongated fastening rail and to prevent said bracket from sliding on said elongated fastening rail.