diff --git a/boards/xtensa/esp32s3/esp32s3-devkit/configs/usbmsc/defconfig b/boards/xtensa/esp32s3/esp32s3-devkit/configs/usbmsc/defconfig
index cdac5c4207d..d87781c610a 100644
--- a/boards/xtensa/esp32s3/esp32s3-devkit/configs/usbmsc/defconfig
+++ b/boards/xtensa/esp32s3/esp32s3-devkit/configs/usbmsc/defconfig
@@ -2,8 +2,11 @@
 CONFIG_BCH=y
 CONFIG_DEV_ZERO=y
 CONFIG_ESP32S3_SPIFLASH=y
+CONFIG_ESP32S3_SPIFLASH_MTD_BLKSIZE=512
 CONFIG_SYSTEM_USBMSC=y
 CONFIG_SYSTEM_USBMSC_DEVPATH1="/dev/ram10"
+CONFIG_SYSTEM_USBMSC_DEVPATH2="/dev/esp32s3flash"
 CONFIG_USBMSC=y
 CONFIG_USBMSC_EPBULKIN=2
 CONFIG_USBMSC_EPBULKOUT=1
+CONFIG_SYSTEM_USBMSC_NLUNS=2