The WD MyBook is likely NTFS formatted. Roon OS doesn’t like to read NTFS storage that is flagged as “unsafely removed”. You may have to fix that on a Windows PC. See also:
The WD MyBook is likely NTFS formatted. Roon OS doesn’t like to read NTFS storage that is flagged as “unsafely removed”. You may have to fix that on a Windows PC. See also: