3M MP220 Operator's Manual page 46

Notification Related to microSD Card
The following icons are notifications you will see when inserting or removing a
microSD card.
The microSD card is installed and the system preparing it for use.
The system is scanning the microSD card for media files.
The microSD card was unexpectedly removed.
The microSD card Remove SD card please insert a new one.
Removing the microSD Card
Before removing the microSD card, the projector must be told to unmount the card.
You will use the SD card & Local Storage Settings screen in Settings to unmount
the card.
Unmount microSD card:
1 Press the Home button.
2 Press the Menu button.
3 Select Settings.
4 Select SD card & local storage.
5 Select Unmount SD card and select OK in the Unmount SD card dialog.
6 A SD card safe to remove notification will appear in the status bar. Now the
SD card is ready for removal. See Ejecting the microSD Card for instructions.
Ejecting the microSD Card
1 Open the microSD slot door.
2 Push the microSD card into the microSD slot until it "clicks".
3 Release the microSD card and the card will eject.
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3M Pocket Projector MP220