diff --git a/User-Support:-SD-card.md b/User-Support:-SD-card.md
index b6fc7e78..42c330e6 100644
--- a/User-Support:-SD-card.md
+++ b/User-Support:-SD-card.md
@@ -5,7 +5,8 @@ Many rusEFI units have on-board microSD card slot.
 ## Validation without vehicle power
 
 * Windows 10 or Windows 11 is required, Windows 7 is not supported for Mass Storage Device.
-* Ignition OFF or ECU not even hooked to vehicle
+* Ignition OFF or ECU not even hooked to vehicle.
+* Give it 15 seconds while connected only to PC via USB.
 * USB Drive expected. Could be another letter like D:\ or F:\ but it has to be in the list of drives.
 
 ![image](https://github.com/user-attachments/assets/3f164970-b014-437c-a4cd-25ab2aed31ad)