diff --git a/scripts/wk/kit/ufd.py b/scripts/wk/kit/ufd.py
index eb739457..76ed2520 100644
--- a/scripts/wk/kit/ufd.py
+++ b/scripts/wk/kit/ufd.py
@@ -5,6 +5,7 @@ import logging
 import math
 import os
 import pathlib
+import re
 import shutil
 from subprocess import CalledProcessError
 
@@ -287,7 +288,7 @@ def confirm_selections(update=False) -> None:
 
 def copy_source(source, items, from_live=False, overwrite=False) -> None:
   """Copy source items to /mnt/UFD."""
-  is_image = not from_live and source.is_file()
+  is_image = not from_live and (source.is_file() or source.is_block_device())
   items_not_found = False
 
   # Mount source if necessary
@@ -472,6 +473,7 @@ def is_valid_path(path_obj, path_type) -> bool:
     valid_path = path_obj.is_file() and path_obj.suffix.lower() == '.img'
   elif path_type == 'ISO':
     valid_path = path_obj.is_file() and path_obj.suffix.lower() == '.iso'
+    valid_path = valid_path or re.match(r'^/dev/sr\d+$', str(path_obj))
   elif path_type == 'UFD':
     valid_path = path_obj.is_block_device()