If the files were there in totality, they would have no need to transfer the paper files. GCMS are available with two options. Electronic and then 'paper file copy'. If you want the latter, it takes much longer and they need to physically photocopy your file in it's entirety which is then mailed or emailed to you, depending on your personal choice.
I maintain that all information is not available, hence the horrific answers from helpline when one calls. They don't know anymore than you can find out on your own by logging into ECAS.