Microsoft SQL Server, Error: 3205 I am getting this error while restoring the backup.


  Too many backup devices specified for backup or restore; only 64 are
  allowed. RESTORE HEADERONLY is terminating abnormally. (Microsoft SQL
  Server, Error: 3205)


I have .bak file, I am using SQL Server 2008 R2.

Thanks.
I am sorry to say, but you have a corrupt backup file.  If you can, backup the database again, but use the "with verify" option to ensure it is fully functional.