FHeroes2 requires data files from the original Heroes of Might and Magic 2.
Copy HEROES2.AGG and HEROES2X.AGG (if you own Price of Loyalty expansion) from the original games DATA folder to the ux0:data/fheroes2/data and everything from MAPS folder into the ux0:data/fheroes2/maps.
Data from GoG version of the game is working nicely. Files from the demo version should work too.
Music files in OGG format should be placed into the ux0:data/fheroes2/files/music/ folder.
In order to get music working with audio from GoG release, some file renaming is required (at least with my version of the game).
homm2_01.ogg -> 02 Battle (1).ogg
homm2_02.ogg -> 03 Battle (2).ogg
homm2_03.ogg -> 04 Battle (3).ogg
homm2_04.ogg -> 06 Sorceress Castle.ogg
homm2_05.ogg -> 07 Warlock Castle.ogg
homm2_06.ogg -> 09 Necromancer Castle.ogg
homm2_07.ogg -> 10 Knight Castle.ogg
homm2_08.ogg -> 05 Barbarian Castle.ogg
homm2_09.ogg -> 08 Wizard Castle.ogg
homm2_10.ogg -> 11 Lava Theme.ogg
homm2_11.ogg -> 12 Wasteland Theme.ogg
homm2_12.ogg -> 13 Desert Theme.ogg
homm2_13.ogg -> 14 Snow Theme.ogg
homm2_14.ogg -> 15 Swamp Theme.ogg
homm2_15.ogg -> 16 Ocean Theme.ogg
homm2_16.ogg -> 17 Dirt Theme.ogg
homm2_17.ogg -> 18 Grass Theme.ogg
homm2_18.ogg -> 19 Lost Game.ogg
homm2_19.ogg -> 20 Week (1).ogg
homm2_20.ogg -> 21 Week (2) Month (1).ogg
homm2_21.ogg -> 22.ogg
homm2_22.ogg -> 23 Map Puzzle.ogg
homm2_23.ogg -> 24 Roland's Campaign.ogg
homm2_24.ogg -> 25.ogg
homm2_25.ogg -> 26.ogg
homm2_26.ogg -> 27.ogg
homm2_27.ogg -> 28.ogg
homm2_28.ogg -> 29.ogg
homm2_29.ogg -> 30.ogg
homm2_30.ogg -> 31.ogg
homm2_31.ogg -> 32.ogg
homm2_32.ogg -> 33.ogg
homm2_33.ogg -> 34.ogg
homm2_34.ogg -> 35.ogg
homm2_35.ogg -> 36.ogg
homm2_36.ogg -> 37.ogg
homm2_37.ogg -> 38.ogg
homm2_38.ogg -> 39.ogg
homm2_39.ogg -> 40.ogg
homm2_40.ogg -> 41.ogg
homm2_41.ogg -> 42 Main Menu.ogg
homm2_42.ogg -> 43.ogg
Custom maps
You can download some custom map packs here:
https://sourceforge.net/projects/libsdl-android/files/FreeHeroes2/