FAT-32 USB Drive Read-Only

Hi there,
Suddenly my USB drive became read-only. Please help.
I am able to read the files from the USB-Drive but not write to it.
You can se from the above that the drive is in MS-DOS (FAT32) format and I can only read.
I tried formating the drive, creating partition etc among man other using Disk Utility but nothing is working.
Please help.
Thanks,
Jayesh

Can't erase it either, same error as the partition one. Changing port didn't work too.

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