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First what type of SD card are you using?

Have you tried a different SD card?

The Go Pro cameras are relentlessly picky on SD cards.

The SD card must be UHS Class 10 (30mb/s minimum).

These are on the preferred list for example.

https://www.amazon.com/Lexar-High-Performance-microSDHC-UHS-I-Adapter/dp/B012PLSCQ0/ref=sr_1_13?ie=UTF8&qid=1514258575&sr=8-13&keywords=lexar+sd+card

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