USB MSC code, windows not able to access drive.

[Ash-tink]

I am using the USB MSC code in my project. The project works fine and I am able to see the file system mounted and file being created in the logs. When I plug in the device into my laptop, I can see the device as a drive. However, when I click to access the drive, it asks me to format the drive and I am not able to view the contents of the drive. What might be causing this issue?

[Simonr]

Hi

Sorry, not the formatting, the Mount failed because the file system can't be found for some reason. What voltage is your custom board running on, and what voltages does the external flash device support? There might be a discrepancy here causing these issues. If you'd like we can do a HW review of your design to make sure that everything looks okay on your custom board as well. If you'd like to, let me know and I'll set this case to private mode so its contents will only be visible to yourself and Nordic engineers as I assume you don't want to share HW files publicly. Then you can upload schematics as a .pdf and layout files as gerber files for us to review.

Best regards,

Simon

[Ash-tink]

Hi Simonr,

         The nRF52840 SoC is operated by 3V. We are using AT25DF041B-MAHN-T as external flash drive. The flash drive will support from 1.6V -3.6V range. You can find the details of this flash chip in the below mentioned link.

 https://www.digikey.in/en/products/detail/renesas-electronics-operations-services-limited/AT25DF041B-MAHN-T/6827489  

Please let me know if this helps or you will still need to check the schematic files.

Thanks.