Seeding torrents?

Hello Guys,

I have a very noobish question, but i have read a lot about seeding torrents using a seedbox but one basic thing still isnt clear to me:

Suppose you create a .torrent out of a game.iso and want to seed it through a seedbox, do you have to upload only the .torrent to the box and start seeding or do you also have to upload the actual .iso?

I know i can create the .torrent files on my computer and than just upload them to the seedbox, but as u see i still dont know if i have to upload the data i want to seed too.

Would be realy great if some1 could help me with this :)

Thanks!

Obviously the ISO needs to be on the seedbox

thanks for the answer!
i was nearly sure that it has to be there, its just the last 1%& wasnt clear. but it is now :)