External volumes not appearing in file dialog on Windows or linux
From this Discourse post:
In both Linux and Windows Paraview does not have an option to read a file from an external disk dive. Clicking on ‘File’, then ‘Open’ brings up the ‘Open File’ window, and you can only see the internal computer drive (normally C:/ in Windows); no external drives are visible. Similarly on Linux, there’s no option to read from an external drive.