by the dotted lines in fig6 the corners of the diskette envelopes are closely received within angular cutouts 46 formed in disk supporting insert 22 to assist in holding the 31 2 inch media diskettes in position and prevent their vertical movement within chamber 32 a plurality of node rails 48 are provided on the inner vertical walls of insert 22 fig2 and 3 second disk receiving compartment 34 is superimposed over first disk receiving compartment 32 and is adapted to closely receive two 51 4 inch generally rectangularly shaped computer diskette envelopes 50 fig5 when cover 24 is closed the previously identified tabs 30 formed on cover 24 engage the upper surfaces of the 51 4 inch diskettes in the manner shown in fig5 in this way the diskettes are securely held in position against a planar wall portion 56 formed on disk supporting insert 22 when used in the manner described in the preceding paragraphs the device of the present invention can store and transport two 31 2 inch diskettes 42 in the manner shown in fig5 and 6 and two 51 4 inch diskettes 50 in the manner shown in fig5 as indicated in fig6 the 31.