Steam doesn't support symlinking of your SteamApps directory. Instead, go to Steam->Settings->Downloads+Cloud, and at the bottom is a button "Steam Library Folders". Use that instead. Thanks.
The problem is that many games, such as TF2 do not allow you download to a different library and always use the default location even if you remove it from your "library locations".
@kevincox not many, please see https://github.com/ValveSoftware/steam-for-linux/issues/821#issuecomment-12681450
I have symlinked SteamApps to a different partition but when I try to install a large game like tf2 it complains that I don't have enough space, even though I do because it is not checking the correct drive. I think this might be because it is checking the available space of my
Steam/folder, not mySteam/SteamApps/folder