func deleteFile(index: Int) {
   let file = listOfFiles[index]
   let name = file.name

   if let docURL = directories?.first {
      let fileURL = docURL.appendingPathComponent(name)
      do {
         try manager.removeItem(atPath: fileURL.path)
         listOfFiles.remove(at: index)
      } catch {
         print("File was not removed")
      }
   }
}