>Disclaimer: I'm not a NetApp user.
>
>Google found a useful link for reported file size differences: https://communities.netapp.com/thread/10833 . I don't know if that applies in your case, it seems that link talks about what you see in Windows Explorer vs. what you see in a native NetApp equivalent.
>
>In a much smaller, less sophisticated environment I ran into a problem trying to get Windows Server 2012 "Windows Server" backups to be stored on a QNAP NAS. Although I ended up saving the backups to another non-NAS location I did find out the problem apparently is the NAS does not by default support NTFS sparse files (although this can be enabled).
>
>If the files you've copied to the new environment are sparse that *might* be a problem. It seems NetApp supports NTFS/CIFS sparse files ( https://communities.netapp.com/servlet/JiveServlet/download/110068-45010/tr-3367_Netapp_Storage_Sys_in_Microsoft_Windows_Environment.pdf ) but I have no idea if that support is enabled by default or is enabled in your particular environment. Again, I believe this would only apply if your files are sparse.
>
>You can query the sparse status of a file with http://superuser.com/questions/508801/removing-sparse-file-attribute .
>
>There is some technical information at http://blogs.msdn.com/b/openspecification/archive/2010/11/05/notes-on-sparse-files-and-file-sharing.aspx .

This is very interesting. I will surely take a look at all that tomorrow.

Thanks