EV Data move

Hi,

I have to move all EV data, to new server and new storage. (IBM xiv to Netapp)

I couldnt use storage move or replication.

Netbackup restore is too too slow.

I have 5.5 TB Data

have can i carry my data more efficiently?

do you have any experience? Robocopy or 3rd party file transfer tools?

thanks...