A data storage system comprising: an enclosure which can contain more than one chassis module; a plurality of stacked chassis modules that are interconnected by clips, each chassis module having a slot to receive a storage device without the use of a carrier that is attached to the storage device, each chassis module including a latch provided on a lateral side of the chassis module for selectively securing the storage device within the chassis module and releasing the storage device from the chassis module (150,) and an ejection mechanism for ejecting the storage device when the storage device is released, the latch including a latch release tab and a flange, the latch release tab and the flange integrated into a single resilient latch component that deflects when the storage device is being inserted such that the flange is moved to allow insertion of the storage device into the chassis module and, once inserted, the component returns to its original shape such that the flange blocks at least part of the slot and holds the storage device in the chassis module, wherein the latch release tab allows the component to be manually deflected to move the flange away from the slot to release the storage device; a front plate having a large opening through which the storage device can be inserted into the chassis module and a latch opening through which the latch release tab protrudes through the front plate so as to allow such releasing of the storage device; and a plurality of connectors for direct connection with the storage devices when the storage devices are installed in the chassis modules, the connectors providing at least one of electrical connections and data connections for the storage devices, whereby storage devices can be installed without the use of separate connectors and cables. an enclosure which can contain more than one chassis module; a plurality of stacked chassis modules that are interconnected by clips, each chassis module having a slot to receive a storage device without the use of a carrier that is attached to the storage device, each chassis module including a latch provided on a lateral side of the chassis module for selectively securing the storage device within the chassis module and releasing the storage device from the chassis module (150,) and an ejection mechanism for ejecting the storage device when the storage device is released, the latch including a latch release tab and a flange, the latch release tab and the flange integrated into a single resilient latch component that deflects when the storage device is being inserted such that the flange is moved to allow insertion of the storage device into the chassis module and, once inserted, the component returns to its original shape such that the flange blocks at least part of the slot and holds the storage device in the chassis module, wherein the latch release tab allows the component to be manually deflected to move the flange away from the slot to release the storage device; a front plate having a large opening through which the storage device can be inserted into the chassis module and a latch opening through which the latch release tab protrudes through the front plate so as to allow such releasing of the storage device; and a plurality of connectors for direct connection with the storage devices when the storage devices are installed in the chassis modules, the connectors providing at least one of electrical connections and data connections for the storage devices, whereby storage devices can be installed without the use of separate connectors and cables.