I have used them. My external Maxtor was all of a sudden dead. The reason was never solved, but i might have been due to a fail power supply. I had offers up to 3000$ to fix it with clean room facility and so on. I started to search myself, and found onepcbsolution. The owner, Kevin, has a very fast response time, and answers all questions you might have.
Now to the good part. The cloning of the card, fixed my issue and it saved all the 30.000 pictures of my children and wife, for the cost of almost nothing.
I would give it a shot, or at least try to write them, they are very helpful.
I have ordered the PCB now hopefully it arrives in one piece.
well what happened with me was i got a new motherboard, and the USB headers on the board are right next to the Fire wire ones and the only difference was the colour and since my board has USB 2.0 and USB 3.0 i just "assumed" that the black ones would be USB 3.
i them plugged my external HDD into my USB slot and.......Nothing
tried my phone.....nothing was thinking hmmm
anyway i realized my fault and assumed i had killed my HDD until i tried to play a song on my phone which now also wont connect to the pc but the songs play fine all the content on my phones HDD/SD is fine so am hoping i will have the same lucky with my HDD
since someone said flashing my phone will fix the problem of not connecting, so Fingers crossed...