A computer system having a host coupled to a storage device via a peripheral component interconnect express bus. The host communicates write commands of low priority to the storage device, which places them in a queue for execution at an idle time. In response to a determination that the storage device is in an idle state, the storage device best accommodates the write commands in the idle queue in connection with housekeeping tasks, such as garbage collection and wear leveling, to best reduce write amplification.