A hanging file support apparatus having a rectangular top for receiving hanging file folders. The top contains circular support rods of identical cross section fitted into modular cornerpieces having three orthogonal extensions for receiving the rods. A pair of clip-on dividers with a rod extending between them may be attached to the top. The top may be attached to the top edge or inside of a drawer or other workspace through holes in the cornerpieces. The top may also be supported by vertical support rods that are received by the cornerpieces. The vertical rods may be mounted into holes in a drawer, shelf or other workspace. Alternatively, the vertical rods may be mounted into a base comprised of cornerpieces and rods.