Can't add files from a mounted partition

[outsidecontext]

@skyghis

I’m very interested by a PPA containing the version 1.4.2.
The official PPA is no longer updated

It took some time, but it is updated now:

Picard Ubuntu packages updated

Finally updated Picard packages for Ubuntu are available over the official MusicBrainz Ubuntu PPAs. For most users it is recommended to use the stable PPA to install the latest stable release of Picard (1.4.2 at the time of writing this): sudo add-apt-repository ppa:musicbrainz-developers/stable sudo apt update sudo apt install picard Up-to-date stable packages are available for Ubuntu 14.04 Trusty, 15.05 Vivid, 16.04 Xenial, 17.04 Zesty and upcoming 17.10 Artful. For users wanting to try out…