Ok, ive found it for myself:
Move Steam folder :
https://support.steampowered.com/kb_article.php?ref=7418-YUBN-8129
Also the better way for my problem:
1. Start by closing the Steam client
2. Create the new directory structure you want use as a base on the alternate drive. e.g. "D:\SteamSpare\"
3. Now go to your SteamApps\Common folder. Probably located something like "C:\Program Files (x86)\Steam\SteamApps\Common"
4. Let's reuse the example from above and say you want to play Red Orchestra from the alternate location "D:\SteamSpare\Red Orchestra". Instead of simply copying the Red Orchestra folder, either move it to the new location or copy it and rename the original to something like 'Red Orchestra_BAK' as it's important there's no folder called 'Red Orchestra' at the original location.
5. Now start a Command Prompt as Administrator. If you don't know how to do this, this is how: Open the start menu. Go to All Programs\Accessories. Right click on 'Command Prompt' and choose 'Run as Administrator'
6. We're going to create a juction point between the old location and the new using MKLINK - using a syntax like this: "MKLINK /J [Old Location] [New Location]". So using the Red Orchestra scenario you'll have enter the following:
MKLINK /J "C:\Program Files (x86)\Steam\SteamApps\Common\Red Orchestra" "D:\SteamSpare\Red Orchestra"
7. Press Enter and you are done
