according to the post X21200RL is currently only available via the SSD dashboard. If you have the dashboard installed go to the Tools > Firmware update tab and you can install it there or create a bootable USB drive and update the FW using that.
according to the post X21200RL is currently only available via the SSD dashboard. If you have the dashboard installed go to the Tools > Firmware update tab and you can install it there or create a bootable USB drive and update the FW using that.