diff --git a/README.md b/README.md
index f03b0c8..463b388 100644
--- a/README.md
+++ b/README.md
@@ -4,10 +4,12 @@ Every script file includes the function and a test to show how it's meant to be
 
 ## Check folder for extension
 
-Checks a given folder for certain file extensions recursively. The [check_folder_for_extension test folder](cffe_test) contains of 13 files, 12 of them images, which should be found by the test.
+Checks a given folder for certain file extensions recursively. All found files with the extension(s) are returned in a global array; New files are appended to the array.
+
+The [check_folder_for_extension test folder](cffe_test) contains of 13 files, 12 of them images, which should be found by the test.
 
 function call:
 ```
 check_folder_for_extension ./cffe_test "*.jpg *.JPG"
 ```
-For multiple extensions (or other parts of the file name to match) space separate the list, like shown above.
\ No newline at end of file
+For multiple extensions (or other parts of the file name to match) space separate the list, like shown above.