HTC One VX has these storage types:
Apps are installed to this storage, labeled as
App storage in your phone settings. It also stores data such as your text messages, contacts you created or synchronized to your phone, account settings, and more.
This is another built-in storage, labeled as
Phone storage in your phone settings. This is where you can store your files.
When you connect your phone to your computer, this storage is accessible and you can copy files between them.
Use a storage card for storing more files. You can also set apps such as
Camera to store directly to the card.