I use version 4.40 for Low-Level Format a WD 500GB WD500AAKX HDD and get some errors> Please look at the screenshot posted at Postimage.org: https://i.postimg.cc/ZqFftVMt/Main-Off-6.png

What did that Error 5 mean, and how serious is it? Could I use an app like Drevitalize or whatsoever to overcome that error?

Thanks for any information.

Damaged surface.
Please check smart status with CrystalDiskInfo

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My firmware database:
https://mega.nz/folder/O01DkBRI

Thanks for the answer.

Will do that tomorrow. At the moment I run Drevitalize, which found just one slow sector 101ms till now (98% done), and will run HDD LLFT 4.4 again to see there any changes. Interestingly, from 7 HDD 500GB WD500AAKX just 3 now still running, the others pass their way after 4 years of using already. This special HDD Type is the worst I ever had!
Will report the outcome of the newly LLFMT tomorrow.