Dell Venue 8 (7840, Early 2015) - Manual (Page 15)

Setting Up Your Tablet | 15
Inserting a MicroSD Card
1 Insert a pin or paper clip into the pinhole on the microSD‑card
tray so that the microSD‑card tray pops out.
2 Remove the microSD‑card tray.
3 Align the microSD card so that the pins are pointed toward the
card slot and are facing toward the rear of the tablet.
4 Place the microSD card into the microSD‑card tray.
5 Push the microSD‑card tray into the card slot until it locks into
place.