Trust me am aware of this, but again not as easy as it looks. process requires preparation and manually extract it.
In addition I prefer the commercial ver. to make some $$$ out of this, the tool as you mentioned is not a good idea for commercial purpose but personal usage i Agree

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Kuwait Data Recovery - UNIX GTC
The only reason for time is so that everything doesn't happen at once. By: Albert Einstein

Yes, I understand that. I just don't understand why you need to wire your patient to your donor.

You say you will be offering a commercial product. What will that entail?

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A backup a day keeps DR away.

1. Sometimes PCB does not work, and moving MCU seems like an easier task than soldering tens of wires. This is maybe 5% of all recoveries.
2. Out of those cases when PCB is broken and after MCU is moved about 10% don't work, because the MCU itself has problems (the drive either clicks or does not come ready or similar). In these cases maybe this solution would work
3. What nobody mentioned here is that IF the keys can be extracted from the MCU, there is no need to write them to another MCU, data can be decrypted with software. So extracting keys seems like a move to the right direction.

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SAN, NAS, RAID, Server, and HDD Data Recovery.

knowing the key is just the start, one needs to know other params of the encryption, like salt value, how these are used, which might be tricky in the case of a hw based encryption.
DEK is usually wrapped using some method using the KEK, which is usually some hash of user pwd. Pwd padding, hash count, hash algo, all these methods need perfect discovery. Of course ideally this is the way, but until all these are reversed, writing the MCU key to another mcu might be just as fine.
I was also into it in some extent, but yeah, lack of time...

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Adatmentés - Data recovery

I can do all that for Chargers, just need to know the MCU keys

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SAN, NAS, RAID, Server, and HDD Data Recovery.

nice then

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Adatmentés - Data recovery

What does this mean, and why does the commercial product need a "bridge"? Or is your interpretation of "bridge" something other than the USB-SATA bridge? Once you release the product, everyone will see how it is constructed, so I can't see the point of obfuscation.

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A backup a day keeps DR away.

I have to disagree with you here Doomer:

1- Removing the MCU Key will result in encrypted data
2- Moving Key to another MCU PCB works (tested)

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Kuwait Data Recovery - UNIX GTC
The only reason for time is so that everything doesn't happen at once. By: Albert Einstein

I mean the new commercial product will be based on that, instead of wiring we use the jumper pins (similar to this image)

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Kuwait Data Recovery - UNIX GTC
The only reason for time is so that everything doesn't happen at once. By: Albert Einstein

I understand you are using pogo pins, but I don't understand your reference to a bridge. The donor and patient PCBs have their own USB-SATA bridges, so are you saying that the donor PCB needs to use the patient's bridge? Otherwise you are mangling the terminology.

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A backup a day keeps DR away.