diff --git a/apps/desktop/src/components/layout/SqlFilePanel.vue b/apps/desktop/src/components/layout/SqlFilePanel.vue
index 6758a6184..27e16a628 100644
--- a/apps/desktop/src/components/layout/SqlFilePanel.vue
+++ b/apps/desktop/src/components/layout/SqlFilePanel.vue
@@ -7,6 +7,7 @@ import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from "@/components/ui/dialog";
 import LightTooltip from "@/components/ui/LightTooltip.vue";
+import HelpTooltip from "@/components/ui/tooltip/HelpTooltip.vue";
 import CustomContextMenu, { type ContextMenuItem } from "@/components/ui/CustomContextMenu.vue";
 import { useQueryStore } from "@/stores/queryStore";
 import { useConnectionStore } from "@/stores/connectionStore";
@@ -542,6 +543,9 @@ function clearContextTarget() {
   <div class="h-full flex flex-col overflow-hidden">
     <div class="h-9 flex items-center gap-1 px-2 border-b shrink-0 bg-muted/20">
       <span class="text-[13px] font-medium">{{ t("sqlFileTree.title") }}</span>
+      <HelpTooltip :label="t('sqlFileTree.storageHelp')" side="bottom" :side-offset="4" trigger-class="h-4 w-4" content-class="max-w-[320px] whitespace-pre-line">
+        {{ t("sqlFileTree.storageHelp") }}
+      </HelpTooltip>
       <span class="flex-1" />
       <LightTooltip :text="t('sqlFileTree.filterSettings')" side="bottom" :delay="0" :close-delay="0" nowrap>
         <Button
diff --git a/apps/desktop/src/components/layout/__tests__/SqlFilePanel.storageHelp.spec.ts b/apps/desktop/src/components/layout/__tests__/SqlFilePanel.storageHelp.spec.ts
new file mode 100644
index 000000000..0cd63d660
--- /dev/null
+++ b/apps/desktop/src/components/layout/__tests__/SqlFilePanel.storageHelp.spec.ts
@@ -0,0 +1,63 @@
+// @vitest-environment happy-dom
+
+import { createApp, nextTick, type App } from "vue";
+import { createPinia, setActivePinia } from "pinia";
+import { afterEach, describe, expect, it, vi } from "vitest";
+import i18n from "@/i18n";
+
+vi.mock("@/lib/sqlFile/sqlFileFolders", () => ({
+  getSqlFileFilter: () => "",
+  getSqlFileFolderPaths: () => [],
+  saveSqlFileFilter: vi.fn(),
+  saveSqlFileFolderPaths: vi.fn(),
+  notifySqlFileFoldersChanged: vi.fn(),
+}));
+vi.mock("@/lib/backend/tauriRuntime", () => ({ isTauriRuntime: () => false }));
+
+import SqlFilePanel from "../SqlFilePanel.vue";
+
+const mounted: Array<{ app: App; host: HTMLElement }> = [];
+
+function mountPanel() {
+  setActivePinia(createPinia());
+  const host = document.createElement("div");
+  document.body.appendChild(host);
+  const app = createApp(SqlFilePanel);
+  app.use(i18n);
+  app.mount(host);
+  mounted.push({ app, host });
+  return host;
+}
+
+afterEach(() => {
+  for (const { app, host } of mounted.splice(0)) {
+    app.unmount();
+    host.remove();
+  }
+});
+
+describe("SQL file panel storage help", () => {
+  it("shows a help button next to the title", async () => {
+    const host = mountPanel();
+    await nextTick();
+
+    const header = host.querySelector(".h-9");
+    expect(header).not.toBeNull();
+
+    const label = i18n.global.t("sqlFileTree.storageHelp");
+    const helpButton = header!.querySelector<HTMLButtonElement>(`button[aria-label="${label}"]`);
+    expect(helpButton).not.toBeNull();
+    expect(helpButton!.querySelector("svg")).not.toBeNull();
+  });
+
+  it("keeps the help button directly after the panel title", async () => {
+    const host = mountPanel();
+    await nextTick();
+
+    const header = host.querySelector(".h-9")!;
+    const title = header.querySelector("span");
+    expect(title?.textContent?.trim()).toBe(i18n.global.t("sqlFileTree.title"));
+    const helpButton = title?.nextElementSibling?.querySelector<HTMLButtonElement>("button[aria-label]");
+    expect(helpButton?.getAttribute("aria-label")).toBe(i18n.global.t("sqlFileTree.storageHelp"));
+  });
+});
diff --git a/apps/desktop/src/i18n/__tests__/sqlFileTreeStorageHelpParity.spec.ts b/apps/desktop/src/i18n/__tests__/sqlFileTreeStorageHelpParity.spec.ts
new file mode 100644
index 000000000..c37d184c6
--- /dev/null
+++ b/apps/desktop/src/i18n/__tests__/sqlFileTreeStorageHelpParity.spec.ts
@@ -0,0 +1,61 @@
+import { describe, expect, it } from "vitest";
+import az from "../locales/az";
+import en from "../locales/en";
+import es from "../locales/es";
+import it_ from "../locales/it";
+import ja from "../locales/ja";
+import ko from "../locales/ko";
+import ptBR from "../locales/pt-BR";
+import ru from "../locales/ru";
+import tr from "../locales/tr";
+import zhCN from "../locales/zh-CN";
+import zhTW from "../locales/zh-TW";
+
+// SQL 文件面板顶部的小问号说明这一侧的内容来源（磁盘上的 .sql 文件），
+// SQL 库一侧已有自己的说明，所有语言都必须提供译文，避免回落到英文。
+const KEY = "storageHelp";
+
+const locales: Array<[string, Record<string, unknown>]> = [
+  ["en", en as Record<string, unknown>],
+  ["az", az as Record<string, unknown>],
+  ["es", es],
+  ["it", it_],
+  ["ja", ja],
+  ["ko", ko],
+  ["pt-BR", ptBR],
+  ["ru", ru],
+  ["tr", tr],
+  ["zh-CN", zhCN],
+  ["zh-TW", zhTW],
+];
+
+function sqlFileTreeHelp(locale: Record<string, unknown>): unknown {
+  const tree = locale.sqlFileTree;
+  if (!tree || typeof tree !== "object") return undefined;
+  return (tree as Record<string, unknown>)[KEY];
+}
+
+const englishHelp = sqlFileTreeHelp(en as Record<string, unknown>);
+
+describe("SQL file panel storage help i18n messages", () => {
+  it("en resolves sqlFileTree.storageHelp to text", () => {
+    expect(englishHelp, "sqlFileTree.storageHelp missing from locales/en.ts").toBeTypeOf("string");
+  });
+
+  it("en explains that the panel lists real .sql files on disk", () => {
+    expect(englishHelp).toContain(".sql");
+    expect(englishHelp).toContain("Open Folder");
+  });
+
+  it.each(locales.slice(1))("%s translates sqlFileTree.storageHelp instead of using the English fallback", (_name, locale) => {
+    const help = sqlFileTreeHelp(locale);
+    expect(help, `${_name} sqlFileTree.storageHelp`).toBeTypeOf("string");
+    expect(help, `${_name} sqlFileTree.storageHelp should not reuse the English text`).not.toBe(englishHelp);
+  });
+
+  it("zh-CN points at the Open Folder flow", () => {
+    const help = sqlFileTreeHelp(zhCN as Record<string, unknown>) as string;
+    expect(help).toContain("打开文件夹");
+    expect(help).toContain(".sql");
+  });
+});
diff --git a/apps/desktop/src/i18n/locales/az.ts b/apps/desktop/src/i18n/locales/az.ts
index 8131b1c57..846db47a8 100644
--- a/apps/desktop/src/i18n/locales/az.ts
+++ b/apps/desktop/src/i18n/locales/az.ts
@@ -6670,6 +6670,7 @@ export default withEnglishFallback({
   },
   sqlFileTree: {
     title: "SQL faylları",
+    storageHelp: "Bunlar Qovluq aç ilə açılan diskdəki real .sql fayllarıdır; düzəlişlər birbaşa orijinal fayla yazılır.",
     openFolder: "Qovluq aç",
     closePanel: "Bağla",
     loading: "Yüklənir...",
diff --git a/apps/desktop/src/i18n/locales/en.ts b/apps/desktop/src/i18n/locales/en.ts
index e2fbf3e42..79b4b3f49 100644
--- a/apps/desktop/src/i18n/locales/en.ts
+++ b/apps/desktop/src/i18n/locales/en.ts
@@ -7409,6 +7409,7 @@ export default {
   },
   sqlFileTree: {
     title: "SQL Files",
+    storageHelp: "These are the real .sql files on disk opened via Open Folder; edits are saved straight back to the original file.",
     openFolder: "Open Folder",
     closePanel: "Close",
     loading: "Loading...",
diff --git a/apps/desktop/src/i18n/locales/es.ts b/apps/desktop/src/i18n/locales/es.ts
index 2b1dbc0b6..79c738b84 100644
--- a/apps/desktop/src/i18n/locales/es.ts
+++ b/apps/desktop/src/i18n/locales/es.ts
@@ -9319,6 +9319,7 @@ export default withEnglishFallback({
   },
   sqlFileTree: {
     title: "Archivos SQL",
+    storageHelp: "Son los archivos .sql reales del disco abiertos con Abrir carpeta; las ediciones se guardan directamente en el archivo original.",
     openFolder: "Abrir carpeta",
     closePanel: "Cerrar",
     loading: "Cargando...",
diff --git a/apps/desktop/src/i18n/locales/it.ts b/apps/desktop/src/i18n/locales/it.ts
index 6052ec93a..d3ecb0f46 100644
--- a/apps/desktop/src/i18n/locales/it.ts
+++ b/apps/desktop/src/i18n/locales/it.ts
@@ -9244,6 +9244,7 @@ export default withEnglishFallback({
   },
   sqlFileTree: {
     title: "File SQL",
+    storageHelp: "Sono i file .sql reali sul disco aperti con Apri cartella; le modifiche vengono salvate direttamente nel file originale.",
     openFolder: "Apri cartella",
     closePanel: "Chiudi",
     loading: "Caricamento in corso...",
diff --git a/apps/desktop/src/i18n/locales/ja.ts b/apps/desktop/src/i18n/locales/ja.ts
index 7cd5fe51b..1f6fa5e49 100644
--- a/apps/desktop/src/i18n/locales/ja.ts
+++ b/apps/desktop/src/i18n/locales/ja.ts
@@ -9285,6 +9285,7 @@ export default withEnglishFallback({
   },
   sqlFileTree: {
     title: "SQL ファイル",
+    storageHelp: "「フォルダを開く」で開いたディスク上の実際の.sqlファイルを表示し、編集内容は元のファイルに直接保存されます。",
     openFolder: "フォルダを開く",
     closePanel: "閉じる",
     loading: "読み込み中...",
diff --git a/apps/desktop/src/i18n/locales/ko.ts b/apps/desktop/src/i18n/locales/ko.ts
index 4506d77e0..41dda29e0 100644
--- a/apps/desktop/src/i18n/locales/ko.ts
+++ b/apps/desktop/src/i18n/locales/ko.ts
@@ -6377,6 +6377,7 @@ export default withEnglishFallback({
   },
   sqlFileTree: {
     title: "SQL 파일",
+    storageHelp: "폴더 열기로 연 디스크의 실제 .sql 파일을 표시하며, 편집 내용은 원본 파일에 바로 저장됩니다.",
     openFolder: "폴더 열기",
     closePanel: "닫기",
     loading: "불러오는 중...",
diff --git a/apps/desktop/src/i18n/locales/pt-BR.ts b/apps/desktop/src/i18n/locales/pt-BR.ts
index 92036aa4e..c304bb1e2 100644
--- a/apps/desktop/src/i18n/locales/pt-BR.ts
+++ b/apps/desktop/src/i18n/locales/pt-BR.ts
@@ -9244,6 +9244,7 @@ export default withEnglishFallback({
   },
   sqlFileTree: {
     title: "Arquivos SQL",
+    storageHelp: "São os arquivos .sql reais no disco abertos com Abrir pasta; as edições são salvas diretamente no arquivo original.",
     openFolder: "Abrir pasta",
     closePanel: "Fechar",
     loading: "Carregando...",
diff --git a/apps/desktop/src/i18n/locales/ru.ts b/apps/desktop/src/i18n/locales/ru.ts
index cec950a85..217e709aa 100644
--- a/apps/desktop/src/i18n/locales/ru.ts
+++ b/apps/desktop/src/i18n/locales/ru.ts
@@ -7822,6 +7822,7 @@ export default withEnglishFallback({
   },
   sqlFileTree: {
     title: "SQL-файлы",
+    storageHelp: "Это реальные .sql-файлы на диске, открытые через «Открыть папку»; изменения сохраняются прямо в исходный файл.",
     openFolder: "Открыть папку",
     closePanel: "Закрыть",
     loading: "Загрузка...",
diff --git a/apps/desktop/src/i18n/locales/tr.ts b/apps/desktop/src/i18n/locales/tr.ts
index b75bf4075..677fcff41 100644
--- a/apps/desktop/src/i18n/locales/tr.ts
+++ b/apps/desktop/src/i18n/locales/tr.ts
@@ -6552,6 +6552,7 @@ export default withEnglishFallback({
   },
   sqlFileTree: {
     title: "SQL Dosyaları",
+    storageHelp: "Klasör Aç ile açılan diskteki gerçek .sql dosyalarıdır; düzenlemeler doğrudan özgün dosyaya kaydedilir.",
     openFolder: "Klasör Aç",
     closePanel: "Kapat",
     loading: "Yükleniyor...",
diff --git a/apps/desktop/src/i18n/locales/zh-CN.ts b/apps/desktop/src/i18n/locales/zh-CN.ts
index 684eb93a6..28171a05a 100644
--- a/apps/desktop/src/i18n/locales/zh-CN.ts
+++ b/apps/desktop/src/i18n/locales/zh-CN.ts
@@ -7376,6 +7376,7 @@ export default withEnglishFallback({
   },
   sqlFileTree: {
     title: "SQL 文件",
+    storageHelp: "此处列出通过「打开文件夹」打开的磁盘上真实 .sql 文件，编辑后直接保存回原文件。",
     openFolder: "打开文件夹",
     closePanel: "关闭",
     loading: "加载中...",
diff --git a/apps/desktop/src/i18n/locales/zh-TW.ts b/apps/desktop/src/i18n/locales/zh-TW.ts
index 9abe307db..783266ac9 100644
--- a/apps/desktop/src/i18n/locales/zh-TW.ts
+++ b/apps/desktop/src/i18n/locales/zh-TW.ts
@@ -9251,6 +9251,7 @@ export default withEnglishFallback({
   },
   sqlFileTree: {
     title: "SQL 檔案",
+    storageHelp: "此處列出透過「開啟資料夾」開啟的磁碟上真實 .sql 檔案，編輯後直接儲存回原檔案。",
     openFolder: "開啟資料夾",
     closePanel: "關閉",
     loading: "載入中...",
diff --git a/docs/screenshots/issue-5091-sql-file-panel-help-tooltip.png b/docs/screenshots/issue-5091-sql-file-panel-help-tooltip.png
new file mode 100644
index 000000000..50fb81914
Binary files /dev/null and b/docs/screenshots/issue-5091-sql-file-panel-help-tooltip.png differ