Using FAT Filesystem on the Macronix memory on the nRF9160-DK

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Is there sample code to use a FAT Filesystem on the Macronix memory on the nRF9160-DK?
The full_modem_update sample uses the Flash but not as a filesystem.

It would be great to have a sample or even for mounting it.
Do I need a device tree overlay?
What is required in the mount data structures for the flash and the

Also, if our requirements for persistent storage change, it would be great to use the SD.
In addition to populating the SD socket, what is required?
It appears from the DevZone others have made it work but none of the posts offers a complete solution.

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Thank you very much.

[Hakon]

There is also a mass storage sample located at zephyr/samples/subsys/usb/mass/. Could that be an option for you?

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I'll have a look but there is no USB on the nRF9160-DK, it has a 1 MB SPI Flash on the board.

[Hakon]

After consulting with someone from R&D, I have some good news. There will be a sample developed specifically for your request, hopefully as soon as Friday. It will be in the form of a PR. I will let you know when it is ready.

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Again, thank you and those developing the solution!