A method of transferring data in a flash storage device is provided. A plurality of data segments for transfer between a memory buffer and a plurality of flash memory devices via a plurality of flash memory interfaces is associated with a plurality of respective memory commands. The plurality of memory commands are allocated among the plurality of flash memory interfaces, with each respective memory command being queued at a respective memory interface for transfer of a respective data segment associated with the respective memory command. The plurality of data segments are transferred between the memory buffer and the plurality of flash memory devices based on the plurality of memory commands, with each respective data segment being transferred via the memory interface to which the memory command associated with the respective data segment is queued. The data segments are transferred sequentially in an order corresponding to the queued memory commands.