diff --git a/README b/README
index 26f4c4d..f5823bc 100644
--- a/README
+++ b/README
@@ -27,7 +27,8 @@ click "Keep Blocking".
 
  * File storage: In case you're curious, your notes are stored within the
 %APPDATA%\Luminotes folder in a database file. Attached files are stored with
-the %APPDATA\Luminotes\files folder.
+the %APPDATA\Luminotes\files folder. (It is not recommended that you modify
+or copy these files.)
 
  * USB drive: If you'd like to run Luminotes from a USB drive, then when the
 Luminotes Desktop installer prompts you to select the installation destination