diff --git a/build.sh b/build.sh
index c41080f7..7b7d670b 100755
--- a/build.sh
+++ b/build.sh
@@ -60,6 +60,7 @@ REQUIRE_OTA_UPDATES="${REQUIRE_OTA_UPDATES:-}"
 OTA_EXCLUDED_TARGETS=()
 LOGGING_MATRIX_FAILURES=()
 LOGGING_MATRIX_DEFERRED_TARGETS=()
+LOGGING_MATRIX_DEFERRED_CAPACITY_TARGETS=()
 RADIO_PRESET_SELECTION=""
 KISS_MODE_OVERRIDE="${KISS_MODE_OVERRIDE-}"
 PARSED_COMMAND_ARGS=()
@@ -2107,6 +2108,23 @@ is_logging_size_constrained_target() {
   esac
 }
 
+is_logging_matrix_capacity_deferred_target() {
+  # This STM32WL Companion needs 238 KiB with its complete storage, sensor,
+  # and runtime USB logging contract, while the deployed layout reserves
+  # 32 KiB of its 256 KiB flash for LittleFS.  Do not silently shrink that
+  # storage or remove a feature just to publish a matrix artifact.  The target
+  # remains directly buildable for capacity work; it is omitted from the
+  # logging matrix until its storage-layout decision is explicitly approved.
+  case "$1" in
+    wio-e5-mini_companion_radio_usb)
+      return 0
+      ;;
+    *)
+      return 1
+      ;;
+  esac
+}
+
 prompt_for_kiss_modem_build_policy() {
   local kiss_count=0
   local target
@@ -5662,6 +5680,7 @@ run_logging_matrix_build_targets() {
   fi
   LOGGING_MATRIX_FAILURES=()
   LOGGING_MATRIX_DEFERRED_TARGETS=()
+  LOGGING_MATRIX_DEFERRED_CAPACITY_TARGETS=()
   if [ "${REQUIRE_OTA_UPDATES:-0}" = "1" ]; then
     printf '%s\n' "${OTA_EXCLUDED_TARGETS[@]}" > "${OUTPUT_DIR}/ota-excluded-targets.txt"
   fi
@@ -5672,6 +5691,10 @@ run_logging_matrix_build_targets() {
     if is_mqtt_bridge_target "$target"; then
       continue
     fi
+    if is_logging_matrix_capacity_deferred_target "$target"; then
+      LOGGING_MATRIX_DEFERRED_CAPACITY_TARGETS+=("$target")
+      continue
+    fi
     if requires_esp32_full_cli_profile "$target"; then
       full_only_standard_skip_count=$((full_only_standard_skip_count + 1))
     else
@@ -5728,6 +5751,10 @@ run_logging_matrix_build_targets() {
     echo "${#LOGGING_MATRIX_DEFERRED_TARGETS[@]} standard ESP32 target(s) exceeded the portable OTA slot and were deferred to the expanded FULL pass:"
     printf '  %s\n' "${LOGGING_MATRIX_DEFERRED_TARGETS[@]}"
   fi
+  if [ ${#LOGGING_MATRIX_DEFERRED_CAPACITY_TARGETS[@]} -gt 0 ]; then
+    echo "${#LOGGING_MATRIX_DEFERRED_CAPACITY_TARGETS[@]} standard target(s) are deferred pending an approved storage-capacity decision:"
+    printf '  %s\n' "${LOGGING_MATRIX_DEFERRED_CAPACITY_TARGETS[@]}"
+  fi
   if [ ${#LOGGING_MATRIX_FAILURES[@]} -gt 0 ]; then
     echo "Logging matrix completed with ${#LOGGING_MATRIX_FAILURES[@]} failed build(s):"
     printf '  %s\n' "${LOGGING_MATRIX_FAILURES[@]}"
diff --git a/test/test_build_profiles.sh b/test/test_build_profiles.sh
index 292e43fd..d02c38af 100644
--- a/test/test_build_profiles.sh
+++ b/test/test_build_profiles.sh
@@ -813,6 +813,11 @@ for constrained_companion in \
   is_logging_size_constrained_target "$constrained_companion" \
     || fail "$constrained_companion enabled oversized verbose mesh diagnostics"
 done
+is_logging_matrix_capacity_deferred_target wio-e5-mini_companion_radio_usb \
+  || fail "Wio E5 Mini Companion was not deferred pending its storage decision"
+if is_logging_matrix_capacity_deferred_target wio-e5-mini_repeater; then
+  fail "Wio E5 Mini capacity deferral expanded beyond the affected Companion"
+fi
 if uses_merged_standard_usb_logging nrf_repeater_lora_ota_no_external_sensors; then
   fail "LoRa OTA repeater incorrectly merged USB logging"
 fi