Split up uploaded files into subdirectories

boards/utils.py

@@ -114,7 +114,12 b' def get_upload_filename(model_instance, '
     extension = get_extension(old_filename)
     new_name = '{}.{}'.format(uuid.uuid4(), extension)
 
-    return os.path.join(FILE_DIRECTORY, new_name)
+    # Create 2 directories to split the files because holding many files in
+    # one directory may impact performance
+    dir1 = new_name[0]
+    dir2 = new_name[1]
+
+    return os.path.join(FILE_DIRECTORY, dir1, dir2, new_name)
 
 
 def get_file_mimetype(file) -> str: