A tray module includes a bottom plate, a ring-shaped member, a limiting member, an elastic member and a tray. The ring-shaped member is disposed over the bottom plate and includes a plurality of rolling portions facing the bottom plate. The limiting member is disposed at a periphery of the ring-shaped member and over the ring-shaped member, so that the ring-shaped member is only able to move within a region defined by the limiting member. The elastic member is directly or indirectly connected between an inner ring surface of the ring-shaped member and an upper surface of the bottom plate. The tray is disposed over the limiting member and configured to connect the ring-shaped member.

A paper tray storage system including one or more file inserts and a stand. The paper tray storage system of the present invention allows for papers and other objects of various sizes to be stored properly, while allowing for expandability of storage and for removability of the file inserts. The stand has a series of vertical walls that form a V shape, which the file insert is disposed on. The vertical walls of the stand form compartments. The file insert is easily removed and portable.

A paper tray storage system including one or more file inserts and a stand. The paper tray storage system of the present invention allows for papers and other objects of various sizes to be stored properly, while allowing for expandability of storage and for removability of the file inserts. The stand has a series of vertical walls that form a V shape, which the file insert is disposed on. The vertical walls of the stand form compartments. The file insert is easily removed and portable.