Use setcwd
[Examples]

You can use a text path (ASCII or UNICODE) to access a file or path.
nav_setcwd() allow following string :

• "name.txt" to search a file or directory in current directory
• "nam*" to search the first file or directory corresponding in current directory
• '\' '/' is egal and supported
• "name\" to search a directory in current directory and enter in directory
• "name\name2.txt" to search a path in current directory
• "\name\name2.txt" to search a path in root directory
• "./" is supported at beginning but it is not mandatory
• "../../" is supported at beginning
• "A:\" is supported at beginning, 'A' corresponding at disk 0

Bool search_path( void )
{
   const _MEM_TYPE_SLOW_ U8 path[]="dir1/file.txt";
   
   nav_select(0);                         // Choose a free navigator
   
   // Select a disk and mount it
   nav_drive_set(1);
   nav_partition_mount();
   // HERE the navigator is in root dir

#if( (FS_ASCII == ENABLED) && (FS_UNICODE == ENABLED) )
   nav_string_ascii();  // Select a ASCII name format
#endif

   if( !nav_setcwd( (FS_STRING)path , TRUE, FALSE ) )   // search file "dir1/file.txt" in root dir of disk 1
      return FALSE;
}