Every mobile phone comes with a manual and a support CD. On that CD, you have also manuals in a digital format (PDFs/HTML/DOC) and software which contains drivers and utilities required by the phone to be operable from the computer.
Please locate the box with the support CD and insert it into the CD/DVD-Rom drive of your computer and wait for the autorun to start. Click on the Software section and start the installation of the support software.
After finishing the installation of the software, plug the phone to the computer using the USB cable that comes with the phone; then the Windows system will install the drivers necessary for your phone. On the screen of the phone, a message will appear saying that you will need to accept the USB-PC connection mode.
Then your phone will appear as a drive in the software's interface and you can browse through the content of the storage system.