diff --git a/src/pages/admin/AdminDatabaseHealthPage.tsx b/src/pages/admin/AdminDatabaseHealthPage.tsx
index d7f7347..32bcaae 100644
--- a/src/pages/admin/AdminDatabaseHealthPage.tsx
+++ b/src/pages/admin/AdminDatabaseHealthPage.tsx
@@ -841,7 +841,17 @@ const MigrationTab: React.FC = () => {
 
     _addExportLog(t('Export gestartet: {count} Datenbanken', { count: totalDbs }));
 
-    const rawChunks: string[] = [];
+    let token = '';
+    try {
+      const startRes = await api.post('/api/admin/database-health/migration/export-start');
+      token = startRes.data.token;
+    } catch (err: any) {
+      _addExportLog(t('Fehler beim Starten des Exports: {error}', { error: String(err) }), 'error');
+      toast.showError(t('Export fehlgeschlagen'));
+      setExporting(false);
+      return;
+    }
+
     let totalTables = 0;
     let totalRecords = 0;
     let errors = 0;
@@ -852,18 +862,14 @@ const MigrationTab: React.FC = () => {
       _addExportLog(t('Exportiere {index}/{total}: {db}...', { index: i + 1, total: totalDbs, db: dbName }));
       try {
         const res = await api.get('/api/admin/database-health/migration/export-single', {
-          params: { database: dbName },
-          responseType: 'text',
+          params: { token, database: dbName },
         });
-        const parsed = JSON.parse(res.data);
-        const dbData = parsed.data;
-        totalTables += dbData?.tableCount || 0;
-        totalRecords += dbData?.totalRecords || 0;
-        rawChunks.push(`${JSON.stringify(dbName)}:${JSON.stringify(dbData)}`);
+        totalTables += res.data.tableCount || 0;
+        totalRecords += res.data.totalRecords || 0;
         exportedCount++;
         _addExportLog(
           t('{db}: {tables} Tabellen, {records} Datensaetze', {
-            db: dbName, tables: dbData?.tableCount || 0, records: dbData?.totalRecords || 0,
+            db: dbName, tables: res.data.tableCount || 0, records: res.data.totalRecords || 0,
           }),
           'success',
         );
@@ -885,23 +891,18 @@ const MigrationTab: React.FC = () => {
     }
 
     _addExportLog(t('Erstelle Exportdatei...'));
-    await new Promise(r => setTimeout(r, 0));
 
     try {
-      const meta = JSON.stringify({
-        exportedAt: new Date().toISOString(),
-        version: '1.0',
-        databaseCount: exportedCount,
-        totalTables,
-        totalRecords,
-      });
-      const jsonStr = `{"meta":${meta},"databases":{${rawChunks.join(',')}}}`;
-
       const ts = new Date().toISOString().replace(/:/g, '-').slice(0, 19);
       const scope = isFullExport ? 'full' : 'partial';
       const filename = `db_backup_${instanceLabel}_${scope}_${ts}.json`;
 
-      const blob = new Blob([jsonStr], { type: 'application/json' });
+      const res = await api.get('/api/admin/database-health/migration/export-download', {
+        params: { token, filename },
+        responseType: 'blob',
+      });
+
+      const blob = new Blob([res.data], { type: 'application/json' });
       const url = URL.createObjectURL(blob);
       const a = document.createElement('a');
       a.href = url;
@@ -924,7 +925,7 @@ const MigrationTab: React.FC = () => {
         toast.showSuccess(t('Export erfolgreich'));
       }
     } catch (err: any) {
-      _addExportLog(t('Fehler beim Erstellen der Exportdatei: {error}', { error: String(err) }), 'error');
+      _addExportLog(t('Fehler beim Download der Exportdatei: {error}', { error: String(err) }), 'error');
       toast.showError(t('Export fehlgeschlagen'));
     } finally {
       setExporting(false);