File “cannot be opened for writing”

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4

Which solution was that?

The File explorer is no device. Lyricslover asked for devices like a local HD or a network drive or a NAS.

Where did you get these problematic files from?

Try Lockhunter to explorer which other piece of software is maybe locking your files.
https://lockhunter.com/

If Mp3Tag finds a corrupt file, it refuses to write to it.
For MP3s you can check this with some tools: