Desert Data Recovery (with blurred barcode)

That depends where you are in the world. If you are in the US then its of no use at all. If based in the EU it can be useful.

Have you checked https://firmware.hddsurgery.com/

Not sure if this has been mentioned. But would be good if MRT DE featured the name of the DE task in the top header.

There are CD repair kits available. We have had some success using them. Its a machine that spins the disc and smooths out the top protective layer and sometimes gives access to data. Probably not worth it for a one off use, so you may have to find someone locally who has one.

Shame they cannot stop it crashing.....

You cannot use the same drive. You will effectively be overwriting the very data you are trying to save.

What software did you use to rebuild the NAS?
And are the drives all the same size?

Mogwai wrote: ↑Mon Oct 25, 2021 4:50 pmThats also a software i alrady used, might even be the one that wad partially successful (wase many weeks ago, hat to take a frustration brake...).

You say you first ran the software many weeks ago, have you been using the NAS to save data to since?

They are matching drives/donors for head swaps?