backing up a dvd x copy backup

I use dvd xcopy express to backup my movies but it wont let you bakup a backup.I have dvd decrypter but when i go to write the movie it says its to large.How can i backup my backups?Thanks

 

when i use dvd decrytpter i use clone dvd and have never had a problem backing up an x copy backup.

 

First have a look at the guide here:
http://users.auth.gr/~ichatzim/dvddecrypter.htm

If DVD Decrypter still does not works for you, then use DVD Shrink to compress the disc once again.