Abstract: Hard and soft cases for storing media are disclosed. A hard case includes hooking mechanisms, on one end, and receptacles, on the other end, for interconnecting a hard case with another case. The case has side extensions which can be superimposed to connect it to another similar case. Four cases are connected to form a two by two array. The cases have holes on the body of the cases and on the side extensions so that the array can be mounted to a conventional binder or to a novel binder disclosed where the distance between the rings is about 135±5 millimeters. A soft case made by bonding together plastic sheets includes two straps extending from one end and two straps extending from the other to connect one case with another. The soft case includes extensions that extend outwardly from the sides of the soft case and house flat magnetic and non magnetic strips. Four soft cases are connected to form an array that is mountable to a conventional binder or a binder with a larger distance between the rings.