diff --git a/firmware/fs/program.bat b/firmware/fs/program.bat
index e881cb0..05460f1 100644
--- a/firmware/fs/program.bat
+++ b/firmware/fs/program.bat
@@ -1 +1 @@
-nrfutil device --x-ext-mem-config-file "%~dp0buzzy.json" program --firmware "%~dp0lfs_external_flash.hex" --options verify=VERIFY_READ,reset=RESET_SYSTEM,ext_mem_erase_mode=ERASE_RANGES_TOUCHED_BY_FIRMWARE
\ No newline at end of file
+nrfutil device --x-ext-mem-config-file "%~dp0buzzy.json" program --firmware "%~dp0lfs_external_flash.hex" --options chip_erase_mode=ERASE_NONE,verify=VERIFY_READ,reset=RESET_SYSTEM,ext_mem_erase_mode=ERASE_RANGES_TOUCHED_BY_FIRMWARE
\ No newline at end of file
diff --git a/firmware/fs/program.sh b/firmware/fs/program.sh
index b2684ee..8dfec92 100755
--- a/firmware/fs/program.sh
+++ b/firmware/fs/program.sh
@@ -1,4 +1,4 @@
 #!/usr/bin/env sh
 SCRIPT_DIR="$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)"
 
-nrfutil device --x-ext-mem-config-file "$SCRIPT_DIR/buzzy.json" program --firmware "$SCRIPT_DIR/lfs_external_flash.hex" --options verify=VERIFY_READ,reset=RESET_SYSTEM,ext_mem_erase_mode=ERASE_RANGES_TOUCHED_BY_FIRMWARE
+nrfutil device --x-ext-mem-config-file "$SCRIPT_DIR/buzzy.json" program --firmware "$SCRIPT_DIR/lfs_external_flash.hex" --options chip_erase_mode=ERASE_NONE,verify=VERIFY_READ,reset=RESET_SYSTEM,ext_mem_erase_mode=ERASE_RANGES_TOUCHED_BY_FIRMWARE