diff --git a/meta-digi-arm/classes/image_types_digi.bbclass b/meta-digi-arm/classes/image_types_digi.bbclass
index f30b47b04..38e08b3d4 100644
--- a/meta-digi-arm/classes/image_types_digi.bbclass
+++ b/meta-digi-arm/classes/image_types_digi.bbclass
@@ -291,11 +291,17 @@ IMAGE_CMD_sdcard() {
 		SDIMG_BOOT="$(readlink -e ${SDIMG_BOOTLOADER})"
 	fi
 
+	# Decompress rootfs image
+	gzip -d -k ${SDIMG_ROOTFS}.gz
+
 	# Burn bootloader, boot and rootfs partitions
 	dd if=${SDIMG_BOOT} of=${SDIMG} conv=notrunc,fsync seek=${BOOTLOADER_SEEK} bs=1K
 	dd if=${SDIMG_BOOTFS} of=${SDIMG} conv=notrunc,fsync seek=1 bs=$(expr ${IMAGE_ROOTFS_ALIGNMENT} \* 1024)
 	dd if=${SDIMG_ROOTFS} of=${SDIMG} conv=notrunc,fsync seek=1 bs=$(expr ${IMAGE_ROOTFS_ALIGNMENT} \* 1024 + ${BOOT_SPACE_ALIGNED} \* 1024)
+
+	# Delete the decompressed rootfs image
+	rm -f ${SDIMG_ROOTFS}
 }
 
 # The sdcard image requires the boot and rootfs images to be built before
-IMAGE_TYPEDEP_sdcard = "${SDIMG_BOOTFS_TYPE} ${SDIMG_ROOTFS_TYPE}"
+IMAGE_TYPEDEP_sdcard = "${SDIMG_BOOTFS_TYPE} ${SDIMG_ROOTFS_TYPE}.gz"
diff --git a/meta-digi-arm/conf/machine/ccimx6qpsbc.conf b/meta-digi-arm/conf/machine/ccimx6qpsbc.conf
index 5895509ae..f169eb2f3 100644
--- a/meta-digi-arm/conf/machine/ccimx6qpsbc.conf
+++ b/meta-digi-arm/conf/machine/ccimx6qpsbc.conf
@@ -47,4 +47,4 @@ XBEE_TTY ?= "ttymxc4"
 BOOT_SCRIPTS = "boot.scr:boot.scr"
 
 # Flash image types
-IMAGE_FSTYPES ?= "boot.vfat ext4 sdcard tar.bz2 recovery.vfat"
+IMAGE_FSTYPES ?= "boot.vfat ext4.gz sdcard tar.bz2 recovery.vfat"
diff --git a/meta-digi-arm/conf/machine/ccimx6sbc.conf b/meta-digi-arm/conf/machine/ccimx6sbc.conf
index 9f2cc2818..ba2da795c 100644
--- a/meta-digi-arm/conf/machine/ccimx6sbc.conf
+++ b/meta-digi-arm/conf/machine/ccimx6sbc.conf
@@ -47,4 +47,4 @@ XBEE_TTY ?= "ttymxc4"
 BOOT_SCRIPTS = "boot.scr:boot.scr"
 
 # Flash image types
-IMAGE_FSTYPES ?= "boot.vfat ext4 sdcard tar.bz2 recovery.vfat"
+IMAGE_FSTYPES ?= "boot.vfat ext4.gz sdcard tar.bz2 recovery.vfat"
diff --git a/meta-digi-arm/conf/machine/ccimx8mm-dvk.conf b/meta-digi-arm/conf/machine/ccimx8mm-dvk.conf
index 2bbfc74cd..fe7e879db 100644
--- a/meta-digi-arm/conf/machine/ccimx8mm-dvk.conf
+++ b/meta-digi-arm/conf/machine/ccimx8mm-dvk.conf
@@ -44,4 +44,4 @@ XBEE_TTY ?= "ttymxc3"
 BOOT_SCRIPTS = "boot.scr:boot.scr"
 
 # Flash image types
-IMAGE_FSTYPES ?= "boot.vfat ext4 sdcard tar.bz2 recovery.vfat"
+IMAGE_FSTYPES ?= "boot.vfat ext4.gz sdcard tar.bz2 recovery.vfat"
diff --git a/meta-digi-arm/conf/machine/ccimx8mn-dvk.conf b/meta-digi-arm/conf/machine/ccimx8mn-dvk.conf
index fe9e43638..e46efb2de 100644
--- a/meta-digi-arm/conf/machine/ccimx8mn-dvk.conf
+++ b/meta-digi-arm/conf/machine/ccimx8mn-dvk.conf
@@ -46,4 +46,4 @@ XBEE_TTY ?= "ttymxc3"
 BOOT_SCRIPTS = "boot.scr:boot.scr"
 
 # Flash image types
-IMAGE_FSTYPES ?= "boot.vfat ext4 sdcard tar.bz2 recovery.vfat"
+IMAGE_FSTYPES ?= "boot.vfat ext4.gz sdcard tar.bz2 recovery.vfat"
diff --git a/meta-digi-arm/conf/machine/ccimx8x-sbc-express.conf b/meta-digi-arm/conf/machine/ccimx8x-sbc-express.conf
index 5aba0390b..c30713074 100644
--- a/meta-digi-arm/conf/machine/ccimx8x-sbc-express.conf
+++ b/meta-digi-arm/conf/machine/ccimx8x-sbc-express.conf
@@ -33,4 +33,4 @@ XBEE_TTY ?= "ttyLP0"
 BOOT_SCRIPTS = "boot.scr:boot.scr"
 
 # Flash image types
-IMAGE_FSTYPES ?= "boot.vfat ext4 sdcard tar.bz2 recovery.vfat"
+IMAGE_FSTYPES ?= "boot.vfat ext4.gz sdcard tar.bz2 recovery.vfat"
diff --git a/meta-digi-arm/conf/machine/ccimx8x-sbc-pro.conf b/meta-digi-arm/conf/machine/ccimx8x-sbc-pro.conf
index 2c3a9eebf..77f81c01d 100644
--- a/meta-digi-arm/conf/machine/ccimx8x-sbc-pro.conf
+++ b/meta-digi-arm/conf/machine/ccimx8x-sbc-pro.conf
@@ -46,4 +46,4 @@ BOOT_SCRIPTS = "boot.scr:boot.scr"
 UBOOT_HAS_FASTBOOT = "true"
 
 # Flash image types
-IMAGE_FSTYPES ?= "boot.vfat ext4 sdcard tar.bz2 recovery.vfat"
+IMAGE_FSTYPES ?= "boot.vfat ext4.gz sdcard tar.bz2 recovery.vfat"
diff --git a/meta-digi-dey/classes/dey-image-installer.bbclass b/meta-digi-dey/classes/dey-image-installer.bbclass
index 17ad6ed7c..bf5908d18 100644
--- a/meta-digi-dey/classes/dey-image-installer.bbclass
+++ b/meta-digi-dey/classes/dey-image-installer.bbclass
@@ -27,6 +27,10 @@ generate_installer_zip () {
 	if readlink -e "${DEPLOY_DIR_IMAGE}/install_linux_fw_uuu.sh"; then
 		INSTALLER_FILELIST="${INSTALLER_FILELIST} ${DEPLOY_DIR_IMAGE}/install_linux_fw_uuu.sh"
 	fi
+	# Decompress the ext4.gz image, if any
+	if readlink -e "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.ext4.gz" >/dev/null; then
+		gzip -d -k -f ${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.ext4.gz
+	fi
 	for ext in ${FSTYPES_WHITELIST}; do
 		if readlink -e "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.${ext}" >/dev/null; then
 			INSTALLER_FILELIST="${INSTALLER_FILELIST} ${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.${ext}"
@@ -50,6 +54,11 @@ _EOF_
 	zip -j ${IMGDEPLOYDIR}/${IMAGE_NAME}.installer.zip ${INSTALLER_FILELIST} ${IMGDEPLOYDIR}/README.txt
 	rm -f ${IMGDEPLOYDIR}/README.txt
 
+	# Delete the decompressed ext4 image, if any
+	if readlink -e "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.ext4" >/dev/null; then
+		rm -f ${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.ext4
+	fi
+
 	# Create the symlink
 	if [ -n "${IMAGE_LINK_NAME}" ] && [ -e "${IMGDEPLOYDIR}/${IMAGE_NAME}.installer.zip" ]; then
 		ln -sf ${IMAGE_NAME}.installer.zip ${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.installer.zip