diff --git a/gui/html/images/README.chronoshare b/gui/html/images/README.chronoshare
new file mode 100644
index 0000000..bca2cd9
--- /dev/null
+++ b/gui/html/images/README.chronoshare
@@ -0,0 +1,3 @@
+If new extensions are added to this folder, these extensions 
+need also be added to chronoshare-helper.js::fileExtension funnction.
+