diff --git a/readme.md b/readme.md
index 871728a..48643f4 100644
--- a/readme.md
+++ b/readme.md
@@ -76,3 +76,24 @@ Use the -k parameter to keep the original filenames:
 
 For the case you want to reduce or increase the timespan between events, simply use the parameter -d. The default is 4:
 ```python recovery.py <path to files recovered by Photorec> <destination> -d10```
+
+
+#### Rename jpg-files with <Date>_<Time> from EXIF data if possible
+
+If the original jpg image files were named by <Date>_<Time> it might be useful to rename the recovered files in the same way. This can be done by adding the parameter -j.
+```python recovery.py <path to files recovered by Photorec> <destination> -j```
+
+If no EXIF data can be retrieved the original filename is kept.
+
+In case there are two or more files with the same EXIF data the filename is extended by an index to avoid overwritng files.
+
+The result will look like:
+```
+20210121_134407.jpg
+20210122_145205.jpg
+20210122_145205(1).jpg
+20210122_145205(2).jpg
+20210122_145813.jpg
+20210122_153155.jpg
+```
+
diff --git a/recovery.py b/recovery.py
index 5e4dbd5..365fb68 100755
--- a/recovery.py
+++ b/recovery.py
@@ -59,7 +59,7 @@ def get_args():
     parser.add_argument('-m', '--split-months', action='store_true', required=False, help='split JPEG files not only by year but by month as well')
     parser.add_argument('-k', '--keep_filename', action='store_true', required=False, help='keeps the original filenames when copying')
     parser.add_argument('-d', '--min-event-delta', type=int, default=4, required=False, help='minimum delta in days between two days')
-    parser.add_argument('-j', '--date_time_filename', action='store_true', required=False, help='sets the filename to the exif date and time if possible - otherwise set filename depending on -k')    
+    parser.add_argument('-j', '--date_time_filename', action='store_true', required=False, help='sets the filename to the exif date and time if possible - otherwise keep the original filename')    
 
     return parser.parse_args()
 
@@ -86,7 +86,7 @@ print("Reading from source '%s', writing to destination '%s' (max %i files per d
 if keepFilename:
     print("I will keep you filenames as they are")
 elif date_time_filename:
-    print("If possible I will rename your files like <Date>_<Time>.jpg - otherwise keep you filenames as they are")
+    print("If possible I will rename your files like <Date>_<Time>.jpg - otherwise keep the filenames as they are")
 else:
     print("I will rename your files like '1.jpg'")