An electronic device comprises a casing, a hard disk, a housing on the casing of the electronic device intended to host the hard disk, and a stopper ensuring the holding of the hard disk in the housing. The stopper comprises a first fixation mechanism on a first end of the stopper to the casing of the electronic device, and a second fixation mechanism on a second end of the stopper to the casing of the electronic device. According to exemplary embodiments, the first fixation mechanism is a clip, the second fixation mechanism is a lock, and the stopper also comprises a hinge enabling the articulation of the stopper around its first end. According to another aspect of the invention, the device comprises a seal positioned on the stopper during the first assembly of the hard disk.