# The Filesystem and the File Folio

This chapter describes the 3DO file system. It includes sample code that illustrates how to use File folio calls. This chapter contains the following topics:

- 3DO File System Interface
- Pathnames and Filenames
- Byte-Stream File Access
- Accessing Directories
- The Current Directory
- Loading and Executing an Application
- Working With NVRAM
- File System Folio Function Calls
- Examples