Google Drive: first steps and how to upload files...

This week google released google drive. After registering one day later i got my personal cloud space:

After this short intro you are directed to your web user interface:

The menu bar on the left side contains all operations to create or share files:

All administration commands are placed there, but how can i upload files?
Just use this Button (the right one):

and you get:

After that you can edit your files via google docs: