Why do I need a microsd slot inside the RDC8445S?

as I understand it, is this an alternative version of the built-in emmS memory? It is possible to install an SD card using the switch?

• blue sea

  : Hello, the microsd slot is used for burning controller programs and cannot be used externally. The second question is that the product model name has changed. The product model number 8445 was changed later, and the original product model number was 6642, so the controller components will be marked with the original model name. You can use it with confidence!

• X-Shadow

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  @blue sea

  : Your answer is not entirely clear! especially unclear about external devices! Please explain in more detail

• blue sea

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  @X-Shadow

  : Hello, the answer to your question is the result confirmed by our company's product research and development team, please confirm again if you are not clear!