diff --git a/main.js b/main.js
index 2af64b7..6bfff93 100644
--- a/main.js
+++ b/main.js
@@ -1,9 +1,10 @@
-const { app, BrowserWindow, dialog, ipcMain } = require('electron');
+const { app, BrowserWindow, dialog, ipcMain, shell } = require('electron');
 const path = require('path');
 const fs = require('fs-extra');
 
 const { processFolder } = require('./services/folderProcessor');
 const { processZip } = require('./services/zipProcessor');
+const { resolveUnroutedDir, listUnroutedFiles } = require('./services/unrouted');
 
 const CAD_EXTENSIONS = ['prt', 'asm', 'dwr'];
 const DEFAULT_DESTINATION = './output/cad';
@@ -168,3 +169,16 @@ ipcMain.handle('update-destination', async (_event, payload) => {
   await persistDestination(config.destination);
   return { destination: config.destination };
 });
+
+ipcMain.handle('open-unrouted-folder', async () => {
+  const unroutedDir = await resolveUnroutedDir();
+  const openResult = await shell.openPath(unroutedDir);
+
+  if (openResult) {
+    throw new Error(`Impossibile aprire la cartella: ${openResult}`);
+  }
+
+  return { path: unroutedDir };
+});
+
+ipcMain.handle('list-unrouted-files', async () => listUnroutedFiles());
diff --git a/preload.js b/preload.js
index e69c810..8729748 100644
--- a/preload.js
+++ b/preload.js
@@ -8,4 +8,6 @@ contextBridge.exposeInMainWorld('api', {
   getDestination: () => ipcRenderer.invoke('get-destination'),
   selectDestinationFolder: () => ipcRenderer.invoke('select-destination-folder'),
   updateDestination: (destination) => ipcRenderer.invoke('update-destination', { destination }),
+  openUnroutedFolder: () => ipcRenderer.invoke('open-unrouted-folder'),
+  listUnroutedFiles: () => ipcRenderer.invoke('list-unrouted-files'),
 });
diff --git a/renderer/index.html b/renderer/index.html
index d4ce8c1..19ca720 100644
--- a/renderer/index.html
+++ b/renderer/index.html
@@ -161,6 +161,65 @@
         color: var(--muted);
       }
 
+      .preview-overlay {
+        position: fixed;
+        inset: 0;
+        background: rgba(15, 23, 42, 0.55);
+        display: none;
+        align-items: center;
+        justify-content: center;
+        padding: 16px;
+        z-index: 20;
+      }
+
+      .preview-overlay.visible {
+        display: flex;
+      }
+
+      .preview-card {
+        width: min(900px, 100%);
+        max-height: 85vh;
+        background: #ffffff;
+        border: 1px solid var(--border);
+        border-radius: 12px;
+        padding: 14px;
+        display: flex;
+        flex-direction: column;
+        gap: 10px;
+      }
+
+      .preview-header {
+        display: flex;
+        align-items: center;
+        justify-content: space-between;
+        gap: 10px;
+      }
+
+      .preview-header h2 {
+        margin: 0;
+        font-size: 18px;
+      }
+
+      .preview-meta {
+        font-size: 12px;
+        color: var(--muted);
+        word-break: break-all;
+      }
+
+      .preview-list {
+        margin: 0;
+        background: #0f172a;
+        color: #e2e8f0;
+        border: 1px solid var(--border);
+        border-radius: 10px;
+        padding: 12px;
+        overflow: auto;
+        min-height: 220px;
+        max-height: 58vh;
+        font-size: 13px;
+        white-space: pre-wrap;
+      }
+
       @media (max-width: 760px) {
         .rule-row {
           grid-template-columns: 1fr;
@@ -200,11 +259,25 @@
           <button id="browseDestinationBtn" class="browse">Sfoglia</button>
           <button id="saveDestinationBtn">Salva</button>
         </div>
+        <div class="rule-row single-row">
+          <button id="openUnroutedBtn" class="browse">Anteprima non smistati</button>
+        </div>
         <div class="rule-status" id="destinationStatus"></div>
       </section>
       <pre id="output">Pronto.</pre>
     </main>
 
+    <section class="preview-overlay" id="unroutedPreviewOverlay">
+      <article class="preview-card">
+        <div class="preview-header">
+          <h2>Anteprima __NON_SMISTATI</h2>
+          <button id="closeUnroutedPreviewBtn" class="secondary">Chiudi</button>
+        </div>
+        <div class="preview-meta" id="unroutedPreviewMeta"></div>
+        <pre class="preview-list" id="unroutedPreviewList">Nessun dato.</pre>
+      </article>
+    </section>
+
     <script src="./renderer.js"></script>
   </body>
 </html>
diff --git a/renderer/renderer.js b/renderer/renderer.js
index 6294442..4fc9fa7 100644
--- a/renderer/renderer.js
+++ b/renderer/renderer.js
@@ -5,7 +5,12 @@ const output = document.getElementById('output');
 const destinationInput = document.getElementById('destinationInput');
 const browseDestinationBtn = document.getElementById('browseDestinationBtn');
 const saveDestinationBtn = document.getElementById('saveDestinationBtn');
+const openUnroutedBtn = document.getElementById('openUnroutedBtn');
 const destinationStatus = document.getElementById('destinationStatus');
+const unroutedPreviewOverlay = document.getElementById('unroutedPreviewOverlay');
+const closeUnroutedPreviewBtn = document.getElementById('closeUnroutedPreviewBtn');
+const unroutedPreviewMeta = document.getElementById('unroutedPreviewMeta');
+const unroutedPreviewList = document.getElementById('unroutedPreviewList');
 const defaultDropZoneText = 'Trascina qui una cartella o un file .zip';
 let isProcessing = false;
 
@@ -18,6 +23,31 @@ function setDestinationLoading(isLoading) {
   destinationInput.disabled = isLoading;
   browseDestinationBtn.disabled = isLoading;
   saveDestinationBtn.disabled = isLoading;
+  openUnroutedBtn.disabled = isLoading;
+}
+
+function formatBytes(bytes) {
+  const value = Number(bytes || 0);
+  if (value < 1024) return `${value} B`;
+  if (value < 1024 * 1024) return `${(value / 1024).toFixed(1)} KB`;
+  if (value < 1024 * 1024 * 1024) return `${(value / (1024 * 1024)).toFixed(1)} MB`;
+  return `${(value / (1024 * 1024 * 1024)).toFixed(1)} GB`;
+}
+
+function showUnroutedPreview(payload) {
+  const files = payload?.files || [];
+  const directory = payload?.directory || '';
+  const lines = files.length
+    ? files.map((file) => `- ${file.relativePath} | ${formatBytes(file.size)}`).join('\n')
+    : 'Nessun file presente in __NON_SMISTATI.';
+
+  unroutedPreviewMeta.textContent = `cartella: ${directory} | file totali: ${files.length}`;
+  unroutedPreviewList.textContent = lines;
+  unroutedPreviewOverlay.classList.add('visible');
+}
+
+function hideUnroutedPreview() {
+  unroutedPreviewOverlay.classList.remove('visible');
 }
 
 function renderResult(title, result) {
@@ -166,6 +196,34 @@ saveDestinationBtn.addEventListener('click', async () => {
   }
 });
 
+openUnroutedBtn.addEventListener('click', async () => {
+  try {
+    setDestinationLoading(true);
+    destinationStatus.textContent = 'Caricamento anteprima non smistati...';
+
+    const result = await window.api.listUnroutedFiles();
+    showUnroutedPreview(result);
+    destinationStatus.textContent = `Anteprima caricata (${result.files?.length || 0} file).`;
+  } catch (error) {
+    destinationStatus.textContent = `Errore: ${error.message}`;
+  } finally {
+    setDestinationLoading(false);
+  }
+});
+
+closeUnroutedPreviewBtn.addEventListener('click', hideUnroutedPreview);
+unroutedPreviewOverlay.addEventListener('click', (event) => {
+  if (event.target === unroutedPreviewOverlay) {
+    hideUnroutedPreview();
+  }
+});
+
+window.addEventListener('keydown', (event) => {
+  if (event.key === 'Escape' && unroutedPreviewOverlay.classList.contains('visible')) {
+    hideUnroutedPreview();
+  }
+});
+
 async function initConfigUI() {
   try {
     const destinationResult = await window.api.getDestination();
diff --git a/services/unrouted.js b/services/unrouted.js
index b8b558e..cab4645 100644
--- a/services/unrouted.js
+++ b/services/unrouted.js
@@ -46,8 +46,58 @@ async function getUnroutedTarget(fileName) {
   };
 }
 
+async function listFilesRecursively(rootDir) {
+  const files = [];
+
+  async function walk(currentDir) {
+    let entries;
+    try {
+      entries = await fs.readdir(currentDir, { withFileTypes: true });
+    } catch {
+      return;
+    }
+
+    for (const entry of entries) {
+      const fullPath = path.join(currentDir, entry.name);
+
+      if (entry.isDirectory()) {
+        await walk(fullPath);
+        continue;
+      }
+
+      if (!entry.isFile()) {
+        continue;
+      }
+
+      const stats = await fs.stat(fullPath).catch(() => null);
+      if (!stats) {
+        continue;
+      }
+
+      files.push({
+        name: entry.name,
+        relativePath: path.relative(rootDir, fullPath),
+        size: stats.size,
+        updatedAt: stats.mtime.toISOString(),
+      });
+    }
+  }
+
+  await walk(rootDir);
+  files.sort((a, b) => a.relativePath.localeCompare(b.relativePath, 'it'));
+  return files;
+}
+
+async function listUnroutedFiles() {
+  const directory = await resolveUnroutedDir();
+  const files = await listFilesRecursively(directory);
+  return { directory, files };
+}
+
 module.exports = {
   getUnroutedTarget,
+  resolveUnroutedDir,
+  listUnroutedFiles,
   PRIMARY_UNROUTED_DIR,
   HOME_UNROUTED_DIR,
 };