diff --git a/Cloud-storage.md b/Cloud-storage.md
index 5ba9f57..ffa4231 100644
--- a/Cloud-storage.md
+++ b/Cloud-storage.md
@@ -8,6 +8,8 @@ Once you enable cloud storage support, a new UI widget will be available in the
 
 ![screenshot](https://cloud.githubusercontent.com/assets/585534/9213128/5f29f5f2-405d-11e5-92a9-b2d9e8db3d42.png)
 
+Cloud storage support will actually work if and only if you actually enable sync support in your browser -- otherwise all the uBlock settings exported to/imported from to the cloud storage will really be stored only locally on your device.
+
 Your uBlock Origin settings are precious, and in order to prevent any automated browser's syncing task to cause precious local data (or cloud data) to be mistakenly overwritten, the chosen solution in uBlock Origin is to _never_ ever export to/import from cloud storage without **the user expressly asking uBlock Origin to do so**.
 
 So essentially, the sync feature in uBlock is implemented as a global clipboard (through cloud storage) to where settings are copied to/pasted from, and only you decide when to export/import.