NSString *appFile;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    appFile = [documentsDirectory stringByAppendingPathComponent:@"myFile"];
    //this creates the file path


    NSDictionary* tempDict = [[NSDictionary alloc]initWithContentsOfFile:appFile];
    //this gets the data from storage

    [tempDict writeToFile:appFile atomically:YES];
    //this updates the data to storage