Hi Satish,
Now If you press RESET and connect the board with PC, could you see the BOOTLOADER disk symbol again? Actually we usually update the OpenSDA firmware as below:
1.Press RESET before connect the frdm board with PC
2.Release RESET after connection with PC.
3.Copy the binary file to the BOOTLOADER disk.
4.detach the device when copy is finished.
Please try above steps and kindly let me know if the problem is still there.
You may refer to SEGGER - The Embedded Experts - OpenSDA / OpenSDA V2 for more details.
Hope that helps,
Have a great day,
Kan
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