Valid FAT-system filenames have the following form:
| [\][directory\]filename[.extension] |
The directory parameter specifies the directory that contains the file's directory entry. This value must be followed by a backslash (\) to separate it from the filename. If the specified directory is not in the current directory, directory must include the names of all directories in the path, separated by backslashes. The root directory is specified by using a backslash at the beginning of the name. For example, if the directory abc is in the directory sample and sample is in the root directory, the correct directory specification is \sample\abc. A directory name consists of any combination of up to eight letters, digits, or the following special characters:
| $ \% ' - _ @ ~ ` ! ( ) |
A directory name can also have an extension, which is any combination of up to three letters, digits, or special characters, preceded by a period (.). The filename and extension parameters specify the file. Filename can be any combination of up to eight letters, digits, or the following special characters:
| $ \% ' - _ @ ~ ` ! ( ) |
Extension can be any combination of up to three letters, digits, or special characters, preceded by a period.