Samsung Galaxy Book Flex User Manual page 45

Basics
Inserting a memory card
1
Insert the ejection pin into the hole on the memory card tray
and gently remove the memory card tray from the memory
card tray slot.
2
Place a memory card on the memory card tray with the gold-
colored contacts facing downward.
3
Gently press the memory card into the tray to secure it, and
reinsert the memory card tray.
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