Sony Cyber-shot RX10 III - Manual (Page 39)

2. Insert the memory card.
Ensure that the notched corner is facing in the correct direction.
With the notched corner facing in the direction illustrated, insert the memory card
until it clicks into place.
3. Close the cover.
Hint
When you use a memory card with this product for the first time, it is recommended that
you format the card using the product for stable performance of the memory card.
[16] How to Use Preparing the camera Inserting a memory card (sold separately)
Removing the memory card
How to remove the memory card
1. Open the memory card cover.
2. Make sure that the access lamp
(A) is not lit.