Sony VPLL-3024 Fixed Short Throw Lens (2.34:1 to 3.19:1) - Manual (Page 234)

Help Guide
Linear PCM Recorder
PCM-A10
The microSD card is not detected.
Remove the microSD card and insert it in the correct orientation.
You may have formatted the microSD card with a device other than your linear PCM recorder, such as a computer.
Be sure to use the linear PCM recorder for formatting microSD cards.
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