Samsung J1 SM-J120F - Manual (Page 17)

Basics
17
1 Remove the back cover.
2 Insert a memory card with the gold-coloured contacts facing downwards.
3 Replace the back cover.
Removing the memory card
Before removing the memory card, first unmount it for safe removal.
On the Home screen, tap
→ Settings → Storage → Unmount SD card.
1 Remove the back cover.
2 Pull out the memory card.
3 Replace the back cover.
Do not remove the memory card while the device is transferring or accessing
information. Doing so can cause data to be lost or corrupted or damage to the
memory card or device. Samsung is not responsible for losses that result from the
misuse of damaged memory cards, including the loss of data.