diff --git a/bin/device-install.bat b/bin/device-install.bat
index 56de4dc10..9c206d718 100755
--- a/bin/device-install.bat
+++ b/bin/device-install.bat
@@ -7,6 +7,7 @@ SET "DEBUG=0"
 SET "PYTHON="
 SET "TFT_BUILD=0"
 SET "BIGDB8=0"
+SET "MUIDB8=0"
 SET "BIGDB16=0"
 SET "ESPTOOL_BAUD=115200"
 SET "ESPTOOL_CMD="
@@ -17,7 +18,8 @@ SET "BPS_RESET=0"
 SET "S3=s3 v3 t-deck wireless-paper wireless-tracker station-g2 unphone t-eth-elite tlora-pager mesh-tab dreamcatcher ESP32-S3-Pico seeed-sensecap-indicator heltec_capsule_sensor_v3 vision-master icarus tracksenger elecrow-adv"
 SET "C3=esp32c3"
 @REM FIXME: Determine flash size from PlatformIO variant, this is unmaintainable.
-SET "BIGDB_8MB=picomputer-s3 unphone seeed-sensecap-indicator crowpanel-esp32s3 heltec_capsule_sensor_v3 heltec-v3 heltec-vision-master-e213 heltec-vision-master-e290 heltec-vision-master-t190 heltec-wireless-paper heltec-wireless-tracker heltec-wsl-v3 icarus seeed-xiao-s3 tbeam-s3-core tracksenger"
+SET "BIGDB_8MB=crowpanel-esp32s3 heltec_capsule_sensor_v3 heltec-v3 heltec-vision-master-e213 heltec-vision-master-e290 heltec-vision-master-t190 heltec-wireless-paper heltec-wireless-tracker heltec-wsl-v3 icarus seeed-xiao-s3 tbeam-s3-core tracksenger"
+SET "MUIDB_8MB=picomputer-s3 unphone seeed-sensecap-indicator"
 SET "BIGDB_16MB=t-deck mesh-tab t-energy-s3 dreamcatcher ESP32-S3-Pico m5stack-cores3 station-g2 t-eth-elite tlora-pager t-watch-s3 elecrow-adv"
 
 GOTO getopts
@@ -162,6 +164,15 @@ FOR %%a IN (%BIGDB_8MB%) DO (
 )
 :end_loop_bigdb_8mb
 
+FOR %%a IN (%MUIDB_8MB%) DO (
+    IF NOT "!FILENAME:%%a=!"=="!FILENAME!" (
+        @REM We are working with any of %MUIDB_8MB%.
+        SET "MUIDB8=1"
+        GOTO end_loop_muidb_8mb
+    )
+)
+:end_loop_muidb_8mb
+
 FOR %%a IN (%BIGDB_16MB%) DO (
     IF NOT "!FILENAME:%%a=!"=="!FILENAME!" (
         @REM We are working with any of %BIGDB_16MB%.
@@ -172,6 +183,7 @@ FOR %%a IN (%BIGDB_16MB%) DO (
 :end_loop_bigdb_16mb
 
 IF %BIGDB8% EQU 1 CALL :LOG_MESSAGE INFO "BigDB 8mb partition selected."
+IF %MUIDB8% EQU 1 CALL :LOG_MESSAGE INFO "MUIDB 8mb partition selected."
 IF %BIGDB16% EQU 1 CALL :LOG_MESSAGE INFO "BigDB 16mb partition selected."
 
 @REM Extract BASENAME from %FILENAME% for later use.
@@ -216,6 +228,12 @@ IF %BIGDB8% EQU 1 (
     SET "SPIFFS_OFFSET=0x670000"
 )
 
+@REM Offsets for MUIDB 8mb.
+IF %MUIDB8% EQU 1 (
+    SET "OTA_OFFSET=0x5D0000"
+    SET "SPIFFS_OFFSET=0x670000"
+)
+
 @REM Offsets for BigDB 16mb.
 IF %BIGDB16% EQU 1 (
     SET "OTA_OFFSET=0x650000"
@@ -232,14 +250,14 @@ IF NOT EXIST !SPIFFS_FILENAME! CALL :LOG_MESSAGE ERROR "File does not exist: "!S
 
 @REM Flashing operations.
 CALL :LOG_MESSAGE INFO "Trying to flash "!FILENAME!", but first erasing and writing system information..."
-CALL :RUN_ESPTOOL !ESPTOOL_BAUD! erase-flash || GOTO eof
-CALL :RUN_ESPTOOL !ESPTOOL_BAUD! write-flash 0x00 "!FILENAME!" || GOTO eof
+CALL :RUN_ESPTOOL !ESPTOOL_BAUD! erase_flash || GOTO eof
+CALL :RUN_ESPTOOL !ESPTOOL_BAUD! write_flash 0x00 "!FILENAME!" || GOTO eof
 
 CALL :LOG_MESSAGE INFO "Trying to flash BLEOTA "!OTA_FILENAME!" at OTA_OFFSET !OTA_OFFSET!..."
-CALL :RUN_ESPTOOL !ESPTOOL_BAUD! write-flash !OTA_OFFSET! "!OTA_FILENAME!" || GOTO eof
+CALL :RUN_ESPTOOL !ESPTOOL_BAUD! write_flash !OTA_OFFSET! "!OTA_FILENAME!" || GOTO eof
 
 CALL :LOG_MESSAGE INFO "Trying to flash SPIFFS "!SPIFFS_FILENAME!" at SPIFFS_OFFSET !SPIFFS_OFFSET!..."
-CALL :RUN_ESPTOOL !ESPTOOL_BAUD! write-flash !SPIFFS_OFFSET! "!SPIFFS_FILENAME!" || GOTO eof
+CALL :RUN_ESPTOOL !ESPTOOL_BAUD! write_flash !SPIFFS_OFFSET! "!SPIFFS_FILENAME!" || GOTO eof
 
 CALL :LOG_MESSAGE INFO "Script complete!."
 
@@ -251,9 +269,9 @@ EXIT /B %ERRORLEVEL%
 :RUN_ESPTOOL
 @REM Subroutine used to run ESPTOOL_CMD with arguments.
 @REM Also handles %ERRORLEVEL%.
-@REM CALL :RUN_ESPTOOL [Baud] [erase_flash|write-flash] [OFFSET] [Filename]
+@REM CALL :RUN_ESPTOOL [Baud] [erase_flash|write_flash] [OFFSET] [Filename]
 @REM.
-@REM Example:: CALL :RUN_ESPTOOL 115200 write-flash 0x10000 "firmwarefile.bin"
+@REM Example:: CALL :RUN_ESPTOOL 115200 write_flash 0x10000 "firmwarefile.bin"
 IF %DEBUG% EQU 1 CALL :LOG_MESSAGE DEBUG "About to run command: !ESPTOOL_CMD! --baud %~1 %~2 %~3 %~4"
 CALL :RESET_ERROR
 !ESPTOOL_CMD! --baud %~1 %~2 %~3 %~4
diff --git a/bin/device-install.sh b/bin/device-install.sh
index 98937f29a..594f9dd6b 100755
--- a/bin/device-install.sh
+++ b/bin/device-install.sh
@@ -11,31 +11,33 @@ FIRMWARE_OFFSET=0x00
 
 # Variant groups
 BIGDB_8MB=(
-	"picomputer-s3"
-	"unphone"
-	"seeed-sensecap-indicator"
-	"crowpanel-esp32s3"
-	"heltec_capsule_sensor_v3"
-	"heltec-v3"
-	"heltec-vision-master-e213"
-	"heltec-vision-master-e290"
-	"heltec-vision-master-t190"
-	"heltec-wireless-paper"
-	"heltec-wireless-tracker"
-	"heltec-wsl-v3"
-	"icarus"
-	"seeed-xiao-s3"
-	"tbeam-s3-core"
-	"tracksenger"
+    "crowpanel-esp32s3"
+    "heltec_capsule_sensor_v3"
+    "heltec-v3"
+    "heltec-vision-master-e213"
+    "heltec-vision-master-e290"
+    "heltec-vision-master-t190"
+    "heltec-wireless-paper"
+    "heltec-wireless-tracker"
+    "heltec-wsl-v3"
+    "icarus"
+    "seeed-xiao-s3"
+    "tbeam-s3-core"
+    "tracksenger"
+)
+MUIDB_8MB=(
+    "picomputer-s3"
+    "unphone"
+    "seeed-sensecap-indicator"
 )
 BIGDB_16MB=(
-	"t-deck"
-	"mesh-tab"
-	"t-energy-s3"
-	"dreamcatcher"
-	"ESP32-S3-Pico"
-	"m5stack-cores3"
-	"station-g2"
+    "t-deck"
+    "mesh-tab"
+    "t-energy-s3"
+    "dreamcatcher"
+    "ESP32-S3-Pico"
+    "m5stack-cores3"
+    "station-g2"
     "t-eth-elite"
     "tlora-pager"
     "t-watch-s3"
@@ -110,8 +112,8 @@ while [ $# -gt 0 ]; do
         shift
         ;;
     --1200bps-reset)
-		    BPS_RESET=true
-		    ;;
+        BPS_RESET=true
+        ;;
     --) # Stop parsing options
         shift
         break
@@ -162,6 +164,13 @@ if [ -f "${FILENAME}" ] && [ -n "${FILENAME##*"update"*}" ]; then
         fi
     done
 
+    for variant in "${MUIDB_8MB[@]}"; do
+        if [ -z "${FILENAME##*"$variant"*}" ]; then
+            OFFSET=0x670000
+            OTA_OFFSET=0x5D0000
+        fi
+    done
+
     # littlefs* offset for BigDB 16mb and OTA OFFSET.
     for variant in "${BIGDB_16MB[@]}"; do
         if [ -z "${FILENAME##*"$variant"*}" ]; then
@@ -208,9 +217,9 @@ if [ -f "${FILENAME}" ] && [ -n "${FILENAME##*"update"*}" ]; then
     $ESPTOOL_CMD erase-flash
     $ESPTOOL_CMD write-flash $FIRMWARE_OFFSET "${FILENAME}"
     echo "Trying to flash ${OTAFILE} at offset ${OTA_OFFSET}"
-    $ESPTOOL_CMD write-flash $OTA_OFFSET "${OTAFILE}"
+    $ESPTOOL_CMD write_flash $OTA_OFFSET "${OTAFILE}"
     echo "Trying to flash ${SPIFFSFILE}, at offset ${OFFSET}"
-    $ESPTOOL_CMD write-flash $OFFSET "${SPIFFSFILE}"
+    $ESPTOOL_CMD write_flash $OFFSET "${SPIFFSFILE}"
 
 else
     show_help
diff --git a/boards/seeed-sensecap-indicator.json b/boards/seeed-sensecap-indicator.json
index 03bff35b5..37a97cdf1 100644
--- a/boards/seeed-sensecap-indicator.json
+++ b/boards/seeed-sensecap-indicator.json
@@ -2,7 +2,7 @@
   "build": {
     "arduino": {
       "ldscript": "esp32s3_out.ld",
-      "partitions": "default_8MB.csv",
+      "partitions": "partition-table-8MB.csv",
       "memory_type": "qio_opi"
     },
     "core": "esp32",
diff --git a/boards/unphone.json b/boards/unphone.json
index bf711993c..4d37f7bb5 100644
--- a/boards/unphone.json
+++ b/boards/unphone.json
@@ -3,7 +3,7 @@
     "arduino": {
       "ldscript": "esp32s3_out.ld",
       "memory_type": "qio_opi",
-      "partitions": "default_8MB.csv"
+      "partitions": "partition-table-8MB.csv"
     },
     "core": "esp32",
     "extra_flags": [
diff --git a/partition-table-8MB.csv b/partition-table-8MB.csv
new file mode 100644
index 000000000..0bfbc22ba
--- /dev/null
+++ b/partition-table-8MB.csv
@@ -0,0 +1,7 @@
+# This is a layout for 8MB of flash for MUI devices
+# Name,   Type, SubType, Offset,  Size, Flags
+nvs,      data, nvs,     0x9000,  0x5000,
+otadata,  data, ota,     0xe000,  0x2000,
+app0,     app,  ota_0,   0x10000, 0x5C0000,
+flashApp, app,  ota_1,   0x5D0000,0x0A0000,
+spiffs,   data, spiffs,  0x670000,0x180000
\ No newline at end of file
diff --git a/variants/esp32s3/picomputer-s3/platformio.ini b/variants/esp32s3/picomputer-s3/platformio.ini
index d5847959b..b47d5733f 100644
--- a/variants/esp32s3/picomputer-s3/platformio.ini
+++ b/variants/esp32s3/picomputer-s3/platformio.ini
@@ -2,7 +2,7 @@
 extends = esp32s3_base
 board = bpi_picow_esp32_s3
 board_check = true
-board_build.partitions = default_8MB.csv
+board_build.partitions = partition-table-8MB.csv
 ;OpenOCD flash method
 ;upload_protocol = esp-builtin
 ;Normal method
diff --git a/variants/esp32s3/seeed-sensecap-indicator/platformio.ini b/variants/esp32s3/seeed-sensecap-indicator/platformio.ini
index f408054cf..25ec3ebfc 100644
--- a/variants/esp32s3/seeed-sensecap-indicator/platformio.ini
+++ b/variants/esp32s3/seeed-sensecap-indicator/platformio.ini
@@ -6,7 +6,7 @@ platform_packages =
 
 board = seeed-sensecap-indicator
 board_check = true
-board_build.partitions = default_8MB.csv
+board_build.partitions = partition-table-8MB.csv
 upload_protocol = esptool
 
 build_flags = ${esp32_base.build_flags}
diff --git a/variants/esp32s3/unphone/platformio.ini b/variants/esp32s3/unphone/platformio.ini
index 476858ff5..f17a27e17 100644
--- a/variants/esp32s3/unphone/platformio.ini
+++ b/variants/esp32s3/unphone/platformio.ini
@@ -3,7 +3,7 @@
 [env:unphone]
 extends = esp32s3_base
 board = unphone
-board_build.partitions = default_8MB.csv
+board_build.partitions = partition-table-8MB.csv
 upload_speed = 921600
 monitor_speed = 115200
 monitor_filters = esp32_exception_decoder
@@ -20,6 +20,7 @@ build_flags =
   -D UNPHONE_LORA=0
   -D UNPHONE_FACTORY_MODE=0
   -D USE_SX127x
+  -D SDCARD_CS=43
 
 build_src_filter =
   ${esp32s3_base.build_src_filter}
@@ -41,6 +42,7 @@ build_flags =
   -D HAS_SCREEN=1
   -D HAS_TFT=1
   -D HAS_SDCARD
+  -D SDCARD_CS=43
   -D DISPLAY_SET_RESOLUTION
   -D RAM_SIZE=6144
   -D LV_CACHE_DEF_SIZE=2097152
diff --git a/variants/esp32s3/unphone/variant.h b/variants/esp32s3/unphone/variant.h
index e186b5740..366b49233 100644
--- a/variants/esp32s3/unphone/variant.h
+++ b/variants/esp32s3/unphone/variant.h
@@ -52,7 +52,6 @@
 #undef GPS_TX_PIN
 
 #define SD_SPI_FREQUENCY 25000000
-#define SDCARD_CS 43
 
 #define LED_PIN 13     // the red part of the RGB LED
 #define LED_STATE_ON 0 // State when LED is lit