diff --git a/components/4nk/FolderModal.tsx b/components/4nk/FolderModal.tsx
index 67f517f..9c6fe5f 100644
--- a/components/4nk/FolderModal.tsx
+++ b/components/4nk/FolderModal.tsx
@@ -1,6 +1,6 @@
 import React, { useEffect, useState, memo } from 'react';
 import Modal from './Modal';
-import type { FolderData } from '@/lib/4nk/models/FolderData';
+import type { FolderData, AttachedFile } from '@/lib/4nk/models/FolderData';
 import { MemberAutocomplete } from '../ui/member-autocomplete';
 
 type FolderType = 'contrat' | 'projet' | 'rapport' | 'finance' | 'rh' | 'marketing' | 'autre';
@@ -30,7 +30,8 @@ const defaultFolder: FolderData = {
   updated_at: new Date().toISOString(),
   notes: [],
   messages: [],
-  messages_owner: []
+  messages_owner: [],
+  attachedFiles: []
 };
 
 function capitalize(s?: string) {
@@ -38,6 +39,46 @@ function capitalize(s?: string) {
   return s.charAt(0).toUpperCase() + s.slice(1);
 }
 
+// Types de fichiers autorisés
+const ALLOWED_FILE_TYPES = {
+  'application/pdf': '.pdf',
+  'image/png': '.png',
+  'image/jpeg': '.jpg,.jpeg',
+  'image/gif': '.gif',
+  'image/webp': '.webp',
+  'text/plain': '.txt',
+  'application/msword': '.doc',
+  'application/vnd.openxmlformats-officedocument.wordprocessingml.document': '.docx',
+  'application/vnd.ms-excel': '.xls',
+  'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet': '.xlsx'
+};
+
+const MAX_FILE_SIZE = 10 * 1024 * 1024; // 10MB
+
+// Fonction pour convertir un fichier en base64
+const fileToBase64 = (file: File): Promise<string> => {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader();
+    reader.readAsDataURL(file);
+    reader.onload = () => {
+      const result = reader.result as string;
+      // Enlever le préfixe "data:type/subtype;base64,"
+      const base64 = result.split(',')[1];
+      resolve(base64);
+    };
+    reader.onerror = error => reject(error);
+  });
+};
+
+// Fonction pour formater la taille des fichiers
+const formatFileSize = (bytes: number): string => {
+  if (bytes === 0) return '0 Bytes';
+  const k = 1024;
+  const sizes = ['Bytes', 'KB', 'MB', 'GB'];
+  const i = Math.floor(Math.log(bytes) / Math.log(k));
+  return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
+};
+
 // Mapping des couleurs 
 const folderColors: Record<FolderType, { bg: string; border: string; focus: string; button: string }> = {
   contrat: { bg: 'bg-blue-50 dark:bg-blue-900', border: 'border-blue-300 dark:border-blue-700', focus: 'focus:ring-blue-400 dark:focus:ring-blue-600', button: 'bg-blue-500 hover:bg-blue-600' },
@@ -64,6 +105,9 @@ function FolderModal({
   const [currentNote, setCurrentNote] = useState('');
   // --- NOUVEAU: État pour les membres sélectionnés ---
   const [selectedMembers, setSelectedMembers] = useState<string[]>([]);
+  // --- NOUVEAU: États pour la gestion des fichiers ---
+  const [isUploading, setIsUploading] = useState(false);
+  const [uploadError, setUploadError] = useState<string | null>(null);
 
   useEffect(() => {
     if (isOpen) {
@@ -99,6 +143,74 @@ function FolderModal({
     setFolderData(prev => ({ ...prev, notes: (prev.notes || []).filter(n => n !== note) }));
   };
 
+  // --- NOUVEAU: Fonctions pour la gestion des fichiers ---
+  const handleFileUpload = async (event: React.ChangeEvent<HTMLInputElement>) => {
+    const files = event.target.files;
+    if (!files || files.length === 0) return;
+
+    setIsUploading(true);
+    setUploadError(null);
+
+    try {
+      const newFiles: AttachedFile[] = [];
+
+      for (const file of Array.from(files)) {
+        // Vérifier le type de fichier
+        if (!Object.keys(ALLOWED_FILE_TYPES).includes(file.type)) {
+          throw new Error(`Type de fichier non autorisé: ${file.type}`);
+        }
+
+        // Vérifier la taille
+        if (file.size > MAX_FILE_SIZE) {
+          throw new Error(`Fichier trop volumineux: ${file.name} (${formatFileSize(file.size)}). Taille maximale: ${formatFileSize(MAX_FILE_SIZE)}`);
+        }
+
+        // Convertir en base64
+        const base64Data = await fileToBase64(file);
+
+        const attachedFile: AttachedFile = {
+          id: `${Date.now()}-${Math.random().toString(36).substr(2, 9)}`,
+          name: file.name,
+          type: file.type,
+          size: file.size,
+          base64Data,
+          uploadedAt: new Date().toISOString()
+        };
+
+        newFiles.push(attachedFile);
+      }
+
+      // Ajouter les nouveaux fichiers
+      setFolderData(prev => ({
+        ...prev,
+        attachedFiles: [...(prev.attachedFiles || []), ...newFiles]
+      }));
+
+    } catch (error) {
+      setUploadError(error instanceof Error ? error.message : 'Erreur lors du téléchargement');
+    } finally {
+      setIsUploading(false);
+      // Réinitialiser l'input
+      event.target.value = '';
+    }
+  };
+
+  const removeFile = (fileId: string) => {
+    setFolderData(prev => ({
+      ...prev,
+      attachedFiles: (prev.attachedFiles || []).filter(f => f.id !== fileId)
+    }));
+  };
+
+  const downloadFile = (file: AttachedFile) => {
+    const link = document.createElement('a');
+    link.href = `data:${file.type};base64,${file.base64Data}`;
+    link.download = file.name;
+    document.body.appendChild(link);
+    link.click();
+    document.body.removeChild(link);
+  };
+
   const handleSubmit = (e: React.FormEvent) => {
     e.preventDefault();
     onSave?.({ ...folderData, updated_at: new Date().toISOString() }, selectedMembers);
@@ -197,6 +309,110 @@ function FolderModal({
             )}
           </div>
 
+          {/* Fichiers attachés */}
+          <div className="space-y-4">
+            <h3 className="text-xl font-semibold text-gray-900 dark:text-gray-100">Fichiers attachés</h3>
+            
+            {/* Liste des fichiers */}
+            <div className="space-y-2">
+              {(folderData.attachedFiles || []).map((file) => (
+                <div key={file.id} className="flex items-center justify-between bg-gray-100 dark:bg-gray-700 text-gray-900 dark:text-gray-100 px-3 py-2 rounded-md">
+                  <div className="flex items-center space-x-3">
+                    <div className="flex-shrink-0">
+                      {file.type.startsWith('image/') ? (
+                        <svg className="w-5 h-5 text-green-500" fill="currentColor" viewBox="0 0 20 20">
+                          <path fillRule="evenodd" d="M4 3a2 2 0 00-2 2v10a2 2 0 002 2h12a2 2 0 002-2V5a2 2 0 00-2-2H4zm12 12H4l4-8 3 6 2-4 3 6z" clipRule="evenodd" />
+                        </svg>
+                      ) : file.type === 'application/pdf' ? (
+                        <svg className="w-5 h-5 text-red-500" fill="currentColor" viewBox="0 0 20 20">
+                          <path fillRule="evenodd" d="M4 4a2 2 0 012-2h4.586A2 2 0 0112 2.586L15.414 6A2 2 0 0116 7.414V16a2 2 0 01-2 2H6a2 2 0 01-2-2V4z" clipRule="evenodd" />
+                        </svg>
+                      ) : (
+                        <svg className="w-5 h-5 text-blue-500" fill="currentColor" viewBox="0 0 20 20">
+                          <path fillRule="evenodd" d="M4 4a2 2 0 012-2h4.586A2 2 0 0112 2.586L15.414 6A2 2 0 0116 7.414V16a2 2 0 01-2 2H6a2 2 0 01-2-2V4z" clipRule="evenodd" />
+                        </svg>
+                      )}
+                    </div>
+                    <div className="flex-1 min-w-0">
+                      <p className="text-sm font-medium truncate">{file.name}</p>
+                      <p className="text-xs text-gray-500 dark:text-gray-400">{formatFileSize(file.size)}</p>
+                    </div>
+                  </div>
+                  <div className="flex items-center space-x-2">
+                    <button
+                      type="button"
+                      onClick={() => downloadFile(file)}
+                      className="text-blue-500 hover:text-blue-700 text-sm"
+                    >
+                      Télécharger
+                    </button>
+                    {!readOnly && (
+                      <button
+                        type="button"
+                        onClick={() => removeFile(file.id)}
+                        className="text-red-500 hover:text-red-700 ml-2"
+                      >
+                        ×
+                      </button>
+                    )}
+                  </div>
+                </div>
+              ))}
+            </div>
+
+            {/* Zone de téléchargement */}
+            {!readOnly && (
+              <div className="space-y-2">
+                <div className="flex items-center space-x-2">
+                  <input
+                    type="file"
+                    id="file-upload"
+                    multiple
+                    accept={Object.values(ALLOWED_FILE_TYPES).join(',')}
+                    onChange={handleFileUpload}
+                    disabled={isUploading}
+                    className="hidden"
+                  />
+                  <label
+                    htmlFor="file-upload"
+                    className={`cursor-pointer inline-flex items-center px-4 py-2 text-white rounded-md ${colors.button} disabled:opacity-50 ${isUploading ? 'opacity-50 cursor-not-allowed' : ''}`}
+                  >
+                    {isUploading ? (
+                      <>
+                        <svg className="animate-spin -ml-1 mr-2 h-4 w-4 text-white" fill="none" viewBox="0 0 24 24">
+                          <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4"></circle>
+                          <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
+                        </svg>
+                        Téléchargement...
+                      </>
+                    ) : (
+                      <>
+                        <svg className="w-4 h-4 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 4v16m8-8l-8-8-8 8" />
+                        </svg>
+                        Ajouter des fichiers
+                      </>
+                    )}
+                  </label>
+                </div>
+                
+                {/* Message d'erreur */}
+                {uploadError && (
+                  <div className="text-red-500 text-sm bg-red-50 dark:bg-red-900/20 p-2 rounded-md">
+                    {uploadError}
+                  </div>
+                )}
+                
+                {/* Informations sur les types de fichiers autorisés */}
+                <div className="text-xs text-gray-500 dark:text-gray-400">
+                  Types autorisés: PDF, Images (PNG, JPG, GIF, WebP), Documents (DOC, DOCX, XLS, XLSX), TXT
+                  <br />
+                  Taille maximale: {formatFileSize(MAX_FILE_SIZE)}
+                </div>
+              </div>
+            )}
+          </div>
+
           {/* Informations système */}
           <div className="space-y-4">
             <h3 className="text-xl font-semibold text-gray-900 dark:text-gray-100">Informations système</h3>