Try each of the following steps in order until the issue is resolved:
  1. Ensure that the user has rights to export to that drive. If you need assistance with this, contact your IT department or computer professional
  2. Export to the local harddrive
  3. Create a new export using the same parameters defined in the existing export
  4. Save the export parameters with a new name
  5. If the new export runs successfully, delete the old saved export