Wait, but BDMLT is likely a model used in embedded systems. The BDMLT UJ240AS might be part of a home theater system or a Blu-ray player, so the firmware update process might be integrated into the device's settings, not a standalone drive. So the update could be done through the device's menu, or via a connected computer using proprietary software.
Flashing firmware carries a risk. If the process is interrupted (e.g., by a power outage) or if you install the wrong version, you can permanently "brick" (break) your drive. Proceed with caution. matshita bdmlt uj240as firmware update
Are you encountering a or is the drive not showing up in Windows? Wait, but BDMLT is likely a model used in embedded systems