diff --git a/examples/companion_radio/DataStore.cpp b/examples/companion_radio/DataStore.cpp
index 2ba5ccfb..2a16d5a1 100644
--- a/examples/companion_radio/DataStore.cpp
+++ b/examples/companion_radio/DataStore.cpp
@@ -40,8 +40,36 @@ void DataStore::begin() {
   #include <SPIFFS.h>
 #elif defined(RP2040_PLATFORM)
   #include <LittleFS.h>
+#elif defined(NRF52_PLATFORM) || defined(STM32_PLATFORM)
+  #include <InternalFileSystem.h>
 #endif
 
+uint32_t DataStore::getStorageUsedKb() const {
+#if defined(ESP32)
+  return SPIFFS.usedBytes() / 1024;
+#elif defined(RP2040_PLATFORM)
+  FSInfo info;
+  info.usedBytes = 0;
+  _fs->info(info);
+  return info.usedBytes / 1024;
+#else
+  return 0;  // TODO:  InternalFS. method?
+#endif
+}
+
+uint32_t DataStore::getStorageTotalKb() const {
+#if defined(ESP32)
+  return SPIFFS.totalBytes() / 1024;
+#elif defined(RP2040_PLATFORM)
+  FSInfo info;
+  info.totalBytes = 0;
+  _fs->info(info);
+  return info.totalBytes / 1024;
+#else
+  return 0;  // TODO:  InternalFS. method?
+#endif
+}
+
 File DataStore::openRead(const char* filename) {
 #if defined(NRF52_PLATFORM) || defined(STM32_PLATFORM)
   return _fs->open(filename, FILE_O_READ);
diff --git a/examples/companion_radio/DataStore.h b/examples/companion_radio/DataStore.h
index 32ccd196..7bd33301 100644
--- a/examples/companion_radio/DataStore.h
+++ b/examples/companion_radio/DataStore.h
@@ -39,4 +39,6 @@ public:
   bool putBlobByKey(const uint8_t key[], int key_len, const uint8_t src_buf[], uint8_t len);
   File openRead(const char* filename);
   bool removeFile(const char* filename);
+  uint32_t getStorageUsedKb() const;
+  uint32_t getStorageTotalKb() const;
 };
diff --git a/examples/companion_radio/MyMesh.cpp b/examples/companion_radio/MyMesh.cpp
index 97781a08..034f0206 100644
--- a/examples/companion_radio/MyMesh.cpp
+++ b/examples/companion_radio/MyMesh.cpp
@@ -22,7 +22,7 @@
 #define CMD_EXPORT_CONTACT            17
 #define CMD_IMPORT_CONTACT            18
 #define CMD_REBOOT                    19
-#define CMD_GET_BATTERY_VOLTAGE       20
+#define CMD_GET_BATT_AND_STORAGE      20   // was CMD_GET_BATTERY_VOLTAGE
 #define CMD_SET_TUNING_PARAMS         21
 #define CMD_DEVICE_QEURY              22
 #define CMD_EXPORT_PRIVATE_KEY        23
@@ -58,7 +58,7 @@
 #define RESP_CODE_CURR_TIME           9  // a reply to CMD_GET_DEVICE_TIME
 #define RESP_CODE_NO_MORE_MESSAGES    10 // a reply to CMD_SYNC_NEXT_MESSAGE
 #define RESP_CODE_EXPORT_CONTACT      11
-#define RESP_CODE_BATTERY_VOLTAGE     12 // a reply to a CMD_GET_BATTERY_VOLTAGE
+#define RESP_CODE_BATT_AND_STORAGE    12 // a reply to a CMD_GET_BATT_AND_STORAGE
 #define RESP_CODE_DEVICE_INFO         13 // a reply to CMD_DEVICE_QEURY
 #define RESP_CODE_PRIVATE_KEY         14 // a reply to CMD_EXPORT_PRIVATE_KEY
 #define RESP_CODE_DISABLED            15
@@ -1016,12 +1016,17 @@ void MyMesh::handleCmdFrame(size_t len) {
       saveContacts();
     }
     board.reboot();
-  } else if (cmd_frame[0] == CMD_GET_BATTERY_VOLTAGE) {
-    uint8_t reply[3];
-    reply[0] = RESP_CODE_BATTERY_VOLTAGE;
+  } else if (cmd_frame[0] == CMD_GET_BATT_AND_STORAGE) {
+    uint8_t reply[11];
+    int i = 0;
+    reply[i++] = RESP_CODE_BATT_AND_STORAGE;
     uint16_t battery_millivolts = board.getBattMilliVolts();
-    memcpy(&reply[1], &battery_millivolts, 2);
-    _serial->writeFrame(reply, 3);
+    uint32_t used = _store->getStorageUsedKb();
+    uint32_t total = _store->getStorageTotalKb();
+    memcpy(&reply[i], &battery_millivolts, 2); i += 2;
+    memcpy(&reply[i], &used, 4); i += 4;
+    memcpy(&reply[i], &total, 4); i += 4;
+    _serial->writeFrame(reply, i);
   } else if (cmd_frame[0] == CMD_EXPORT_PRIVATE_KEY) {
 #if ENABLE_PRIVATE_KEY_EXPORT
     uint8_t reply[65];