USB Mass Storage write speed is too slow

My NUTTX system version is 12.2.1, when I write to the U disk through TFTP or copy data from the SD card to the U disk, I find that the writing speed of the U disk is only 5~6KB/s, this speed is too slow, is there any way to improve the writing speed of the U disk? I used the STM32F407 and STM32H743, USB OTG configuration in full-speed mode