@BJohn.1I've zipped up the original fix as posted above plus my changes to port it to the STM32F745. I would suggest using a Diff tool like Beyond Compare so you can diff entire directories and subdirectories. Makes the work quicker.Best

I did find the usbh_conf.c in the MSC_Standalone/Src directory. Preliminary testing of the port indicates that everything is working for the STM32F745.Best

Imen, Thanks for putting up a fix. I've been porting it to the STM32F745 and I noticed that there was a function missing in the solution you posted.usbh_pipes.c has the following function:USBH_StatusTypeDef USBH_ActivatePipe(USBH_HandleTypeDef *phost...