Rexing S3 - Inserting the Memory Card

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Step 3
Insert the Memory Card
The Rexing S3 accepts Class 10/ UHS-1 or higher Micro SD memory cards up to
256GB. You will need to insert a memory card before recording. Before inserting or
removing a memory card, ensure you've powered down the device.
Gently push the memory card in until you hear a click, and allow the spring release
to push the card out.