diff --git a/src/Helper/GridHelperService.php b/src/Helper/GridHelperService.php
index 51ad8d82e..59136ac54 100644
--- a/src/Helper/GridHelperService.php
+++ b/src/Helper/GridHelperService.php
@@ -928,6 +928,11 @@ public function createXlsxExportFile(FilesystemOperator $storage, string $fileHa
      */
     private function optimizedConcatLike(string $fullpath): string
     {
+        //special case for the root folder
+        if($fullpath === '/') {
+            return '`path` LIKE "/%"';
+        }
+
         $pathParts = explode('/', $fullpath);
         $leaf = array_pop($pathParts);
         $path = implode('/', $pathParts);
@@ -935,7 +940,7 @@ private function optimizedConcatLike(string $fullpath): string
         return '(
             (`path` = "' . $path . '/" AND `key` = "' . $leaf . '")
             OR
-            `path` LIKE "' . $fullpath . '%"
+            `path` LIKE "' . $fullpath . '/%"
         )';
     }