Canon S820D User Manual page 67

Do not display this dialogue when a card is inserted.
When this checkbox is selected, this screen is not displayed even when a
memory card is inserted. Specified application starts according to the Auto-
start an application when a card is inserted./Do nothing when a card is
inserted. setting.
Close
This item terminates the Memory Card Startup Utility.
Using the Memory Card Startup Utility (Windows)
Starting the Memory Card Startup Utility 67