Select your ReadyNAS's firmware:

    ReadyNAS OS 4 (SPARC)

    Add-Ons for ReadyNAS devices running ReadyNAS OS 4 and using the SPARC architecture. (Duo / NV+ / 1100 / X6)

    ReadyNAS OS 4 (x86)

    Add-Ons for ReadyNAS devices running ReadyNAS OS 4 and using the x86 architecture. (Pro Pioneer / Pro Business / Pro 2 / Pro 4 / Pro 6 / NVX / Ultra 2 / Ultra 4 / Ultra 6 / Ultra 2 Plus / Ultra 4 Plus / Ultra 6 Plus / 1500 / 2100 / 3100 / 3200 / 4200)

    ReadyNAS OS 5 (ARM)

    Add-Ons for ReadyNAS devices running ReadyNAS OS 5 and using the x86 architecture. (DuoV2 / NV+V2)

    ReadyNAS OS 6 (ARM)

    Add-Ons for ReadyNAS devices running ReadyNAS OS 6 and using the ARM architecture. (RN102 / RN104 / RN204 / RN2120)

    ReadyNAS OS 6 (x86)

    Add-Ons for ReadyNAS devices running ReadyNAS OS 6 and using the x86 architecture. (RN312 / RN314 / RN316 / RN516 / RN716x / RN3220 / RN4220)