Dell Venue 8 Pro (3845, Late 2014) - Manual (Page 13)

Setting Up Your Tablet | 13
Inserting a MicroSD card
1 Open the slot cover.
2 Align the microSD card so that the pins are pointed toward the
card slot and are facing toward the front of the tablet.
3 Push the microSD card into the card slot until it locks into place.
4 Close the slot cover.