You can connect your LG Chocolate to your computer using the USB Port. IT only allow you to access the folders on your removable disk inside the phone. There are five folders under the My media folder which are Music, Others, Photos, Text, Videos.  The rest of the stuff are stored in the Internal Memory which you will not be able to see when you connect to the computer through the USB port.Text message, Multmedia message, Inbox, Outbox, Drafts, Multimedia templates, Download messages, Voice recorder, Images, Sounds and Games & more are found in the Internal Memory.
For more info, pls download the Mass Storage Manual by clicking here.