diff --git a/send_data.py b/send_data.py
index cc09f1c..f28870e 100644
--- a/send_data.py
+++ b/send_data.py
@@ -4,6 +4,7 @@
     Send JSON files to ELS
 """
 
+import sys
 import argparse
 import requests
 
@@ -21,7 +22,6 @@ def send_data(file, quiet=False):
                         headers={'Content-Type': 'application/x-ndjson'})
     if res.status_code != 200:
         print("An error occured")
-        # TODO Catch "index_not_found_exception"
         print(res.text)
     else:
         if not quiet:
@@ -40,6 +40,7 @@ def delete_index(index_name, quiet=False):
             print("Deleted!")
     else:
         print("An error occured")
+        # TODO Catch "index_not_found_exception"
         print(res.text)
 
 #### main block ####
@@ -48,39 +49,45 @@ def delete_index(index_name, quiet=False):
 ELASTICSEARCH_URL = 'http://localhost:9200/'
 INDEX_NAME = "itunessongs"
 
+# Default file names
+DEFAULT_SONG_FILE = 'es-music-data.json'
+DEFAULT_ALBUM_FILE = 'es-albums-data.json'
+DEFAULT_ARTIST_FILE = 'es-artist-data.json'
+
 # Get options
 parser = argparse.ArgumentParser(
     description='''
         Send JSON files formated for bulk Elasticsearch operation to an Elasticsearch.
 
-        Send song data is enable by default, send album & artist data is disabled default.
+        By default: send song data enable, send album & artist data disabled.
     '''
 )
-# Choose what to enable for send and files
-song_group = parser.add_mutually_exclusive_group()
-song_group.add_argument('-s', '--song', action='store_false',
-                        help='Disable send song data')
-song_group.add_argument('-sf', '--song-file', type=argparse.FileType('r'),
-                        help='Song file data to send (default: es-music-data.json).')
-parser.add_argument('-al', '--album_file', nargs='?', type=argparse.FileType('r'), const='es-albums-data.json',
-                    help='Enable send album data. Optionally, precise the album file (default: \'es-albums-data.json\')')
-parser.add_argument('-ar', '--artist-file', nargs='?', type=argparse.FileType('r'), const='es-artist-data.json',
-                    help='Enable send artist data. Optionally, precise the artist file (default: \'es-artist-data.json\'')
-# Mode
-parser.add_argument('-A', '--ALL', action='store_true',
-                    help='Send all possible data: song, artist and album')
-parser.add_argument('-D', '--DELETE', action='store_true',
-                    help='Delete old index')
-# ELS Options
-parser.add_argument('-els', '--elasticsearch_url', default=ELASTICSEARCH_URL, nargs='?',
-                    help="Elasticsearch URL to send data (default: {})".format(ELASTICSEARCH_URL))
-parser.add_argument('-idx', '--index_name', default=INDEX_NAME,
-                    help="Index name in Elasticsearch for data (default: {})".format(INDEX_NAME))
 # Bulk
 parser.add_argument('-q', '--quiet', action='store_true',
                     help="Disable main output")
-
-# TODO Use group
+# Choose what to enable for send and files
+sending_group = parser.add_argument_group("Sending options")
+song_group = sending_group.add_mutually_exclusive_group()
+song_group.add_argument('-s', '--song', action='store_false',
+                        help='Disable send song data')
+song_group.add_argument('-sf', '--song-file', type=argparse.FileType('r'),
+                        help='Song file data to send (default: \'{}\').'.format(DEFAULT_SONG_FILE))
+sending_group.add_argument('-al', '--album-file', nargs='?', type=argparse.FileType('r'), const=DEFAULT_ALBUM_FILE,
+                           help='Enable send album data. Optionally, precise the album file (default: \'{}\')'.format(DEFAULT_ALBUM_FILE))
+sending_group.add_argument('-ar', '--artist-file', nargs='?', type=argparse.FileType('r'), const=DEFAULT_ARTIST_FILE,
+                           help='Enable send artist data. Optionally, precise the artist file (default: \'{}\''.format(DEFAULT_ARTIST_FILE))
+# Mode
+mode_group = parser.add_argument_group('Mode')
+mode_group.add_argument('-A', '--ALL', action='store_true',
+                        help='Send all possible data: song, artist and album')
+mode_group.add_argument('-D', '--DELETE', action='store_true',
+                        help='Delete old index')
+# Settings
+g_settings_group = parser.add_argument_group('Global Settings')
+g_settings_group.add_argument('-els', '--elasticsearch-url', default=ELASTICSEARCH_URL, nargs='?',
+                              help="Elasticsearch URL to send data (default: \'{}\')".format(ELASTICSEARCH_URL))
+g_settings_group.add_argument('-idx', '--index-name', default=INDEX_NAME,
+                              help="Index name in Elasticsearch for data (default: \'{}\')".format(INDEX_NAME))
 
 if __name__ == '__main__':
     args = parser.parse_args()
@@ -90,16 +97,27 @@ if __name__ == '__main__':
     ELASTICSEARCH_URL = args.elasticsearch_url
 
     if not args.quiet:
-        print("Settings values:")
+        print("*** Settings values ***")
         print("Elasticsearch URL:\t" + ELASTICSEARCH_URL)
         print("Index name:\t\t" + INDEX_NAME)
         print("")
+    else:
+        print("Processing...")
 
     if args.DELETE:
         delete_index(INDEX_NAME, args.quiet)
 
     if args.song or args.ALL:
-        song_file = args.song_file
+        # Retrieve default song file if not precised
+        if not args.song_file:
+            try:
+                song_file = open(DEFAULT_SONG_FILE, 'r')
+            except FileNotFoundError:
+                print("Error: can't open default music file: [Errno 2] No such file or directory: '{}'.".format(DEFAULT_SONG_FILE))
+                print("Use -sf argument, or -h for more help")
+                sys.exit(2)
+        else:
+            song_file = args.song_file
         if not args.quiet:
             print("Take file '{}' to send song data".format(song_file.name))
         send_data(song_file, args.quiet)