diff --git a/backup.py b/backup.py
index a202d8c..f310d29 100644
--- a/backup.py
+++ b/backup.py
@@ -92,10 +92,16 @@ class Backup:
         for file in files:
             if file['crypt_id'] is not None:
                 encrypted_file = download_file(self.save_mode, os.path.join(self.save_location, str(file['crypt_id']).zfill(ZFILL)), bucket=self.buk)
-
-                if parents:
-                    save_path = os.path.join(save_path, file['path'])
-                uncompress(uncrypt(encrypted_file, self.key), file['name'], save_path, file['compress_mode'])
+                file_hash = get_hash(encrypted_file)
+                if file['sha1sum'] == file_hash:
+                    if parents:
+                        save_path = os.path.join(save_path, file['path'])
+                    uncompress(uncrypt(encrypted_file, self.key), file['name'], save_path, file['compress_mode'])
+                else:
+                    print("Checksum don't match:")
+                    print("{} {}".format(file['sha1sum'], "BDD"))
+                    print("{} {}".format(file_hash, "File"))
+                    print()
 
 
 def upload_file(file, mode, file_name, bucket=None):
@@ -265,7 +271,7 @@ class DataBase:
         # for path in [file['path'] for file in list_file]:
         for path in list_file:
             path = pathlib.PureWindowsPath(path).as_posix()
-            cursor.execute("""SELECT crypt_id, compress_mode FROM files
+            cursor.execute("""SELECT crypt_id, compress_mode, sha1sum FROM files
             INNER JOIN crypt ON files.crypt_id = crypt.id
             WHERE path=?""", (path,))
             retval = cursor.fetchone()
@@ -273,7 +279,8 @@ class DataBase:
                 crypt_list.append({'name': os.path.basename(path),
                                    'path': path,
                                    'crypt_id': retval['crypt_id'],
-                                   'compress_mode': retval['compress_mode']})
+                                   'compress_mode': retval['compress_mode'],
+                                   'sha1sum': retval['sha1sum']})
             except TypeError:
                 crypt_list.append({'path': path, 'crypt': None})
         return crypt_list