From the game's install directory on your device, you'll need to copy these files to the destination device or location:
Bard's Tale 1 - Tales of the Unknown
- bt1d1.2mg
- bt1d2.2mg
Bard's Tale 2 - The Destiny Knight
- bt2d1.2mg
- bt2d2.2mg
Bard's Tale 3 - Thief of Fate
- bt3d1.dsk
- bt3d2.dsk
- bt3d3.dsk
- bt3d4.dsk