In node add, how to upload file using image from clipboard
You could try the FileField Sources module. It provides quite a few additional options to upload files.


  
  Re-use files by an auto-complete textfield
  Attach server-side files uploaded via FTP
  Transfer files from a remote server (cURL required)
  Paste a file directly from the clipboard (Drupal 7 only)
  Select existing files through the IMCE file browser