diff --git a/buildroot-2024.02/configs/milkv-duo256m-musl-riscv64-sd_defconfig b/buildroot-2024.02/configs/milkv-duo256m-musl-riscv64-sd_defconfig
index 79e40749c..58032b4bd 100644
--- a/buildroot-2024.02/configs/milkv-duo256m-musl-riscv64-sd_defconfig
+++ b/buildroot-2024.02/configs/milkv-duo256m-musl-riscv64-sd_defconfig
@@ -459,7 +459,7 @@ BR2_TARGET_ROOTFS_EXT2_4=y
 BR2_TARGET_ROOTFS_EXT2_GEN=4
 BR2_TARGET_ROOTFS_EXT2_REV=1
 BR2_TARGET_ROOTFS_EXT2_LABEL="rootfs"
-BR2_TARGET_ROOTFS_EXT2_SIZE="200M"
+BR2_TARGET_ROOTFS_EXT2_SIZE="786432K"
 BR2_TARGET_ROOTFS_EXT2_INODES=0
 BR2_TARGET_ROOTFS_EXT2_RESBLKS=5
 BR2_TARGET_ROOTFS_EXT2_MKFS_OPTIONS="-O ^64bit"
diff --git a/buildroot-2024.02/configs/milkv-duos-musl-riscv64-sd_defconfig b/buildroot-2024.02/configs/milkv-duos-musl-riscv64-sd_defconfig
index 3cb5a2349..405b706a3 100644
--- a/buildroot-2024.02/configs/milkv-duos-musl-riscv64-sd_defconfig
+++ b/buildroot-2024.02/configs/milkv-duos-musl-riscv64-sd_defconfig
@@ -459,7 +459,7 @@ BR2_TARGET_ROOTFS_EXT2_4=y
 BR2_TARGET_ROOTFS_EXT2_GEN=4
 BR2_TARGET_ROOTFS_EXT2_REV=1
 BR2_TARGET_ROOTFS_EXT2_LABEL="rootfs"
-BR2_TARGET_ROOTFS_EXT2_SIZE="200M"
+BR2_TARGET_ROOTFS_EXT2_SIZE="786432K"
 BR2_TARGET_ROOTFS_EXT2_INODES=0
 BR2_TARGET_ROOTFS_EXT2_RESBLKS=5
 BR2_TARGET_ROOTFS_EXT2_MKFS_OPTIONS="-O ^64bit"