copying vm with 4 .vmdk files yields one small and one large one

I'm copying a large server that has 4 .vmdk files on the source datastore, which is on an iSCSI LUN, and I'm relocating it to an NFS datastore.  I see 4 .vmdk files, but only the first two are size > 0.  The first one is about the right size, but the second one is huge.  I told vSphere to preserve the same type or provisioning (thick,) but I still thought I'd see multiple .vmdk files of comparable size.  Will I end up with just 2 .vmdk files that have any size and pointers to the other 2 for some reason?  Thanks.
thomsoneAsked:
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Maen Abu-TabanjehNetwork Administrator, Network ConsultantCommented:
if you trying to copy directly , its prefer and recommended by vmware to use Winscp for fast and best results in copying

http://winscp.net/eng/download.php
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
NFS may only support Thin Provisioning, depending upon the NFS datastore.
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