The purpose of this page is to show how to upload files to Google Drive, organize those files with folders, and share those files with others. These instructions are introductory and the official support page offers much more detailed information.
Click on the "New" button on the front page of Google Drive
Click on "File upload" in the drop-down menu to upload files from your computer
Alternatively, click on "Folder upload" to upload a folder from your computer
This will open up a window showing local files on your computer
Click on the file or folder you want to upload
Click on "Upload" in the lower right corner of the window
Change "Untitled folder" to whatever name you want for the folder
Click "Create"
This will create a folder in whatever folder you are looking at in Google Drive named whatever you changed "Untitled folder" to
Files in Google Drive can be moved into folder by left-clicking and dragging
Alternatively, you can right-click on the file and select "Move" in the pop-up menu
Doing so will pop-up a new window
Click on the folder that you want to move the file to
Click on "Move" in the lower right corner
You can organize all of your files in Google Drive in this manner, even files that have been shared with you. Moving shared files will not change the location for the person that shared the file with you. To learn more about sharing files go to the Sharing Documents section