System for storing cigarette parts, such as cartridges, of simulated cigarettes, wherein the system comprises: - a tray comprising a rear wall, a left wall, a right wall, a bottom wall, a top wall and a front opening providing access to a compartment for holding the cigarette parts, - a tray conveyor comprising a tray support which is moved along a track and supports the tray in a releasable manner, - a part supply which supplies the cigarette parts one by one in a continuous manner, - a collecting device which collects the supplied cigarette parts and repeatedly places a set of supplied cigarette parts in a predetermined orientation with respect to each other and in a side by side manner, wherein the collecting device comprises a restraining unit to hold the cigarette parts supplied by the part supply until the set of cigarette parts is formed at a collecting location, - a transport unit which moves the formed set of cigarette parts into a discharge location, and wherein a control unit controls the transport unit to move the set of cigarette parts from the collecting location into the discharge location when a predetermined number of cigarette parts forming the set of cigarette parts are collected at the collecting location, in order to create space at the collecting location for the subsequently supplied cigarette parts, - a part mover which repeatedly moves the set of cigarette parts located in the discharge location via the front opening into the compartment of the tray supported by the tray support, while the cigarette parts of the set maintain their predetermined orientation with respect to each and in their side by side manner, and wherein the control unit is configured to control the tray conveyor and the part mover to move the tray along the track over a predetermined distance in a downward direction each time that one set of cigarette parts is placed in the compartment by the part mover so that a subsequent set of cigarette parts can be placed on a previously placed set of cigarette parts, characterised in that the transport unit comprises a transport member which is configured to move said set of cigarette parts from the collecting location into the discharge location by contacting the last supplied cigarette part being part of the set of cigarette parts and moving the set via the contact with the last supplied cigarette part. - a tray comprising a rear wall, a left wall, a right wall, a bottom wall, a top wall and a front opening providing access to a compartment for holding the cigarette parts, - a tray conveyor comprising a tray support which is moved along a track and supports the tray in a releasable manner, - a part supply which supplies the cigarette parts one by one in a continuous manner, - a collecting device which collects the supplied cigarette parts and repeatedly places a set of supplied cigarette parts in a predetermined orientation with respect to each other and in a side by side manner, wherein the collecting device comprises a restraining unit to hold the cigarette parts supplied by the part supply until the set of cigarette parts is formed at a collecting location, - a transport unit which moves the formed set of cigarette parts into a discharge location, and wherein a control unit controls the transport unit to move the set of cigarette parts from the collecting location into the discharge location when a predetermined number of cigarette parts forming the set of cigarette parts are collected at the collecting location, in order to create space at the collecting location for the subsequently supplied cigarette parts, - a part mover which repeatedly moves the set of cigarette parts located in the discharge location via the front opening into the compartment of the tray supported by the tray support, while the cigarette parts of the set maintain their predetermined orientation with respect to each and in their side by side manner, and