diff --git a/floppyemu/__init__.py b/floppyemu/__init__.py
--- a/floppyemu/__init__.py
+++ b/floppyemu/__init__.py
@@ -20,15 +20,21 @@ def get_or_create_empty_image(index, tem
     return filename
 
 
-def format_images(device, indexes, temp_path, size=1440):
+def format_images(device, indexes, temp_path, size=1440, callback=None):
     for ipair in indexes:
         if isinstance(ipair, int):
             image = get_or_create_empty_image(ipair, temp_path, size)
             write_image(device, image, ipair)
+            os.remove(image)
+            if callback:
+                callback(indexes, ipair)
         else:
             for i in range(ipair[0], ipair[1]):
                 image = get_or_create_empty_image(i, temp_path, size)
                 write_image(device, image, i)
+                os.remove(image)
+                if callback:
+                    callback(ipair, i)
 
 
 def write_image(device, path, index=0):