This is Chrome OS not Windows OS. Mail can be accessed thru g-mail, pictures thru Picasa or google+, there is no control panel, use the apps button to go to "files" which gives access to downloads and google drive. Google drive is where to store your documents. There are many good apps in the Web Store.
You have to load your documents into google drive or load photos to Picasa or google+ or store your photos on a removable storage device. The Chromebook stores everything "in the cloud" online or in removable storage. All the things that you need to adjust in Windows are transparent in the Chromebook and taken care of by those wonderful programmers at Google! You must understand that all the world does not use Windows