My files in my EHDD was formated by mistake and I recovered most of them using disk drill. But I can’t find .dat files. Maybe you can help in which category I can find them because there’s thousand of files.
.dat files can belong to multiple types: images, binary, etc. If Disk Drill didn’t locate them after you used all recovery methods, it’s possible that they are gone. Most probably you used Deep Scan, and your .dat files are not reconstructable.