diff --git a/js/app.sync.js b/js/app.sync.js
index 19c59fb..a935d2b 100644
--- a/js/app.sync.js
+++ b/js/app.sync.js
@@ -543,6 +543,8 @@ async function runSyncNow(_attempt) {
                     .replace(/[-:]/g, '').replace('T', '-').slice(0, 15);
                 const path = dir.replace(/[\\/]+$/, '') + '\\vault-presync-' + ts + '.json';
                 await Bridge.writeFile(path, JSON.stringify(container, null, 2));
+            } else {
+                toast('Pre-sync backup skipped — set an auto-backup folder first', 'warning');
             }
         } catch (_) { /* best-effort */ }
     }