Write modules: Firmware of HDD mainly consists of modules. With this function, users can choose the modules they want and flash them to HDD conveniently.

Write tracks: As tracks being the carrier of module, flashing tracks can also change firmware data of HDD. With this function, users can choose tracks and flash them toHDD conveniently.
 
Write ROM: With this funciton, users can flash the data backed up in advance to ROM chip of HDD.

Download link of video tutorial: https://us.mrtlab.com/video/wdwrfires.rar