Cybook Opus

  8 years ago
  Bookeen (eBook reader)
  Mint (older version)
  Works perfectly
What works:

Both the device and the microSD card (if you have one in the device) are recognised and show up in the file manager as a regular storage devices. You can copy and paste files as if it was a USB drive.

If you have a large library you should consider using Calibre for managing it.