A cover assembly includes a panel defining an opening therein for allowing a storage device to move in or out therethrough, a cover shielding the opening, a connecting member, and an elastic member. The connecting member is pivotably connected to the panel through a first pivoting mechanism formed therebetween along a first axis, and is pivotably connected to the cover through a second pivoting mechanism formed therebetween along a second axis separate from and parallel with the first axis. The elastic member is arranged between the cover and the connecting member, for restoring the cover to shield the opening of the panel.