cgsecurity.org

I have followed the previous topic "How to run photorec on NAS with busybox (WD Mycloud)" (currently closed).
But it seems that the current version of "TestDisk & PhotoRec" --> " Marvell 88F628x Linux 2.6.32" is no longer compatible with the current version of the WD MyCloud NAS.

Where could I get a valid previous version of "TestDisk/Photorec"?

Have you try both TestDisk 7.0 and 7.1-WIP version ?

Which version do you mean?
At http://www.cgsecurity.org/wiki/TestDisk_Download there are several versions

Dos.png Dos/Win9x
Win.png Windows
Win.png Windows 64-bit Use only on systems lacking WoW64 as some features are missing
Linux.png Linux, kernel 2.6.18 or later i386
Linux.png Linux, kernel 2.6.18 or later x86_64
Macosx.png Mac OS X Intel
Mac.png Mac OS X PowerPC
Syno.png Marvell 88F628x Linux 2.6.32 Synology DS111, DS211, DS212+ NAS, Seagate BlackArmor NAS 220, QNAP ARM based including TS-410
TestDisk & PhotoRec Source code