diff --git a/flash.c b/flash.c
index aa69d5f..581d1db 100644
--- a/flash.c
+++ b/flash.c
@@ -64,7 +64,7 @@ void flash_unlock(void)
   FLASH->KEYR = 0xCDEF89AB;
 }
 
-static uint32_t
+uint32_t
 checksum(const void *start, size_t len)
 {
   uint32_t *p = (uint32_t*)start;
diff --git a/nanovna.h b/nanovna.h
index dc1d6d1..b141def 100644
--- a/nanovna.h
+++ b/nanovna.h
@@ -1419,6 +1419,7 @@ int caldata_save(uint16_t id);
 int config_save(void);
 int config_recall(void);
 setting_t * caldata_pointer(uint16_t id);
+uint32_t checksum(const void *start, size_t len);
 
 void clear_all_config_prop_data(void);
 
diff --git a/ui.c b/ui.c
index b227658..dc133c3 100644
--- a/ui.c
+++ b/ui.c
@@ -3582,6 +3582,8 @@ enum {
 //#ifdef __SD_CARD_LOAD__
 //  FMT_CMD_FILE,
 //#endif
+  FMT_CFG_FILE,
+  FMT_PRS_FILE,
 };
 
 // Save file extension
@@ -3594,6 +3596,8 @@ static const char *file_ext[] = {
 //#ifdef __SD_CARD_LOAD__
 //  [FMT_CMD_FILE] = "cmd",
 //#endif
+  [FMT_CFG_FILE] = "cfg",
+  [FMT_PRS_FILE] = "prs",
 };
 
 static void sa_save_file(char *name, uint8_t format);
@@ -3619,6 +3623,9 @@ static const menuitem_t menu_store_preset[] =
 {
   { MT_ADV_CALLBACK, 0,  "STORE AS\nSTARTUP",menu_store_preset_acb},
   { MT_ADV_CALLBACK |MT_REPEATS,  DATA_STARTS_REPEATS(1,4),  "STORE %d",         menu_store_preset_acb},
+#ifdef TINYSA4
+  { MT_CALLBACK,    FMT_PRS_FILE,   "STORE\n"S_RARROW"SD",     menu_sdcard_cb},
+#endif
   { MT_ADV_CALLBACK, 100,"FACTORY\nDEFAULTS",menu_store_preset_acb},
   { MT_NONE,     0,     NULL,menu_back} // next-> menu_back
 };
@@ -3627,6 +3634,10 @@ static const menuitem_t menu_load_preset[] =
 {
   { MT_ADV_CALLBACK,            0,                          "LOAD\nSTARTUP", menu_load_preset_acb},
   { MT_ADV_CALLBACK|MT_REPEATS, DATA_STARTS_REPEATS(1,4),   MT_CUSTOM_LABEL, menu_load_preset_acb},
+#ifdef __SD_FILE_BROWSER__
+  { MT_CALLBACK, FMT_PRS_FILE, "LOAD FROM\n SD",            menu_sdcard_browse_cb },
+#endif
+
   { MT_SUBMENU,                 0,                          "STORE"  ,       menu_store_preset},
   { MT_NONE,     0,     NULL, menu_back} // next-> menu_back
 };
@@ -6724,6 +6735,23 @@ static void sa_save_file(char *name, uint8_t format) {
       }
       break;
 #endif
+      /*
+       * Dump preset to SD card as prs file
+       */
+      case FMT_PRS_FILE:
+      {
+        uint16_t *src = (uint16_t*)&setting;
+        int total = sizeof(setting_t);
+        setting.magic = CONFIG_MAGIC;
+        setting.checksum = 0x12345678;
+        setting.checksum = checksum(
+            &setting,
+      //      (sizeof (setting)) - sizeof setting.checksum
+            (void *)&setting.checksum - (void *) &setting
+            );
+        res = f_write(fs_file, src, total, &size);
+      }
+      break;
     }
     f_close(fs_file);
 //    shell_printf("Close = %d\r\n", res);
diff --git a/vna_browser.c b/vna_browser.c
index c3cb50f..15f192c 100644
--- a/vna_browser.c
+++ b/vna_browser.c
@@ -168,6 +168,29 @@ repeat:
 //    else error = "Format err";
 //  }
 //  break;
+  /*
+   *  Load preset
+   */
+  case FMT_PRS_FILE:
+  {
+    uint32_t magic;
+    char *src = (char*)&setting + sizeof(magic);
+    uint32_t total = sizeof(setting_t) - sizeof(magic);
+    // Compare file size and try read magic header, if all OK load it
+    if (fno.fsize == sizeof(setting) && f_read(fs_file, &magic, sizeof(magic), &size) == FR_OK &&
+        magic == CONFIG_MAGIC && f_read(fs_file, src, total, &size) == FR_OK) {
+
+     // TODO remove code duplication with flash.c
+      update_min_max_freq();
+      update_frequencies();
+      set_scale(setting.scale);
+      set_reflevel(setting.reflevel);
+      set_waterfall();
+      set_level_meter();
+    }
+    else error = "Format err";
+  }
+  break;
   default: break;
   }
   f_close(fs_file);