diff --git a/src/lens.c b/src/lens.c
index e56b552ec..b570a13de 100644
--- a/src/lens.c
+++ b/src/lens.c
@@ -2933,27 +2933,122 @@ static LVINFO_UPDATE_FUNC(fps_update)
     }
 }
 
+struct card_t
+{
+    char *drive;                   // drive letter of the card
+    struct card_info *p_card_info; // pointer to internal card information structure
+    double total_space_gb;         // initial estimation of total card space (GB)
+    int free_space_gb;             // dynamic free space (GB) estimation
+};
+
+// compute the cumulated file size (GB) of a given folder:
+double get_folder_size_gb(char *_folder)
+{
+    struct fio_file file;
+    struct fio_dirent *dirent = FIO_FindFirstEx(_folder, &file);
+    if (IS_ERROR(dirent))
+    {
+        return 0;
+    }
+    double cumulated_size_gb = 0;
+    do
+    {
+        if (file.name[0] == 0 || file.name[0] == '.' || (file.mode & ATTR_DIRECTORY))
+        {
+            continue;
+        }
+        cumulated_size_gb += (((double)file.size) / (1024 * 1024 * 1024));
+    } while (FIO_FindNextEx(dirent, &file) == 0);
+    FIO_FindClose(dirent);
+    return cumulated_size_gb;
+}
+
+// compute the cumulated file size (GB) of the DCIM folder of a given card drive:
+double get_dcim_folder_size_gb(char *_drive)
+{
+    char root_folder[FIO_MAX_PATH_LENGTH];
+    snprintf(root_folder, FIO_MAX_PATH_LENGTH, "%sDCIM/", _drive);
+    struct fio_file file;
+    struct fio_dirent *dirent = FIO_FindFirstEx(root_folder, &file);
+    if (IS_ERROR(dirent))
+    {
+        return 0;
+    }
+    double cumulated_size_kb = 0;
+    do
+    {
+        // search for sub-folders:
+        if (file.name[0] == 0 || file.name[0] == '.' || !(file.mode & ATTR_DIRECTORY))
+        {
+            continue;
+        }
+        char folder[FIO_MAX_PATH_LENGTH];
+        snprintf(folder, FIO_MAX_PATH_LENGTH, "%s%s", root_folder, file.name);
+        cumulated_size_kb += get_folder_size_gb(folder);
+    } while (FIO_FindNextEx(dirent, &file) == 0);
+    FIO_FindClose(dirent);
+    return cumulated_size_kb;
+}
+
 static LVINFO_UPDATE_FUNC(free_space_update)
 {
-    LVINFO_BUFFER(8);
-    
+    LVINFO_BUFFER(14);
+    // worst case "SD:999 CF:999"
+
     if (RECORDING)
     {
         /* leave space for the recording indicators */
         return;
     }
 
-    int free_space_32k = get_free_space_32k(get_shooting_card());
+    // the first time, we need to identify what card is available or not:
+    static struct card_t cards[2] = {
+        {"A:/", NULL, 0},
+        {"B:/", NULL, 0},
+    };
+    static struct card_t *available_cards[2] = {NULL, NULL};
+    static int card_count = 0;
+    if (card_count == 0)
+    {
+        for (int i = 0; i < 2; i++)
+        {
+            struct card_t *p_card = &cards[i];
+            if (!is_dir(p_card->drive))
+            {
+                continue;
+            }
+            p_card->p_card_info = get_card(i);
+            // get free space on disk and size of DCIM folder:
+            double free_space_gb = ((double)(((uint64_t)get_free_space_32k(p_card->p_card_info)) << 5) / (1024 * 1024));
+            double dcim_space_gb = get_dcim_folder_size_gb(p_card->drive);
+            // we get an approximation of the total disk space:
+            p_card->total_space_gb = free_space_gb + dcim_space_gb;
+            available_cards[card_count++] = p_card;
+        }
+    }
 
-    int fsg = free_space_32k >> 15;
-    int fsgr = free_space_32k - (fsg << 15);
-    int fsgf = (fsgr * 10) >> 15;
+    // every time, we need to update free space for all available cards:
+    for (int i = 0; i < card_count; i++)
+    {
+        struct card_t *p_card = available_cards[i];
+        // get an approximation of the current free space:
+        double dcim_size_gb = get_dcim_folder_size_gb(p_card->drive);
+        int free_space_gb = (int)(p_card->total_space_gb - dcim_size_gb);
+        p_card->free_space_gb = (free_space_gb > 999) ? 999 : free_space_gb;
+    }
 
-    snprintf(buffer, sizeof(buffer), 
-        "%d.%dGB",
-        fsg,
-        fsgf
-    );
+    // setup display for 1 slot:
+    struct card_t *p_card_1 = available_cards[0];
+    if (card_count == 1)
+    {
+        snprintf(buffer, sizeof(buffer), "%s:%d", p_card_1->p_card_info->type, p_card_1->free_space_gb);
+    }
+    // setup display for 2 slots:
+    else
+    {
+        struct card_t *p_card_2 = available_cards[1];
+        snprintf(buffer, sizeof(buffer), "%s:%d %s:%d", p_card_1->p_card_info->type, p_card_1->free_space_gb, p_card_2->p_card_info->type, p_card_2->free_space_gb);
+    }
 }
 
 static LVINFO_UPDATE_FUNC(mode_update)
@@ -3299,7 +3394,7 @@ static struct lvinfo_item info_items[] = {
         .name = "Temperature",
         .which_bar = LV_TOP_BAR_ONLY,
         .update = temp_update,
-        .priority = 1,
+        .priority = -1,
     },
     {
         .name = "MVI number",