In the other thread I said DLC.
DLC does not mean expansion....it just so happens that DLCs are replaced expansions nowadays.
The DLCs for morrowind are small add-ons for the game, from some small misc things like swamp sound effects, right up to a full blown quest and dungeon. Those are the ones for download on the ES site.
The expansions, Tribunal and bloodmoon are only available in the GOTY now....which if you can find a copy is only about $10 now....so hardly mcuh if you wnat ot get the full game.
If you happen across one that cheap let me know, I have not had luck finding anything under 20!
As for the DLC sorry I know what down loaded content is, I just misunderstood your comment about what was free was all.