STM32H523RCT6 USBX+FileX+SD card, MSC writing speed is slow and cannot be formatted by PC

Alon99 · ‎2024-11-11

Hi Team,

I am using STM32H523RCT6 USBX+FileX+SD card to simulate a USB flash drive, but MSC writing speed is slow and cannot be formatted by PC,The writing speed is only 250KB/S. Can you help me figure out the problem?

FBL · ‎2024-11-21

Hi @Alon99

When using the USBX Device MSC class, the host system manages the filesystem logic, and you should not directly use the FileX API to interact with the storage media. Instead, you should implement the necessary storage driver functions that USBX will call to read from and write to the storage media.

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