A server includes a tray, a handle structure, a first hard disk assembly and a second hard disk assembly. The tray is removably disposed on a server cabinet. Two ends of the handle structure are respectively slidably pivoted to two inner walls of the tray. The first hard disk assembly is movably disposed in the tray. The second hard disk assembly is disposed in the tray. The first hard disk assembly and the second hard disk assembly are placed side by side. Two sides of the first hard disk assembly, which are opposite to each other, are pivoted to the handle structure. When the handle structure is pivoted and slide relative to the tray, the first hard disk assembly is pivotable between a stored position and an inclined position by the handle structure.