Sony A7RIII ILCE-7RM3A Operating Instructions Manual page 406

Help Guide
Interchangeable Lens Digital Camera
ILCE-7RM3A
α7RIII
Rec. Media Settings: Prioritize Rec. Media
Selects the memory card slot on which to record. [Slot 1] is the default setting. If you do not intend to change the settings
and will only use one memory card, use the slot 1.
MENU → (Setup) → [Rec. Media Settings] → [Prioritize Rec. Media] → desired slot.
1
Menu item details
Slot 1:
Selects media in the slot 1.
Slot 2:
Selects media in the slot 2.
Hint
To record the same image on two memory cards at the same time or to sort recorded images onto two memory card slots by the
image type (still image/movie), use [Recording Mode].
Note
The slot 2 supports Memory Stick PRO Duo media and SD cards. The slot 1 supports SD cards only.
Related Topic
Memory cards that can be used
Rec. Media Settings: Recording Mode
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