How do I store an NSMutableArray to Disk on an iPhone app for later retrieval? -

How can I archive NSMutableArray on disk on an iPhone app for recovery later? Easy saving in NSArray (as well as other Asset List Objects) file /

  + (id) array content contentoff: (NSString *) write aPath - (BOOL )Foli: (NSString *) path atom: (BOOL) flag  

For more information this may be useful for reading in Apple documents.