Ah, thanks gboudreau! I just assumed that it was still a physical file as it was showing the full file size, but I've just checked the Properties, and it does indeed point to the 1st drive in the pool.The files with an arrow are not actual files, they are symbolic links. Those will always be there, as they are what allows Samba to show files in your shares.
Those links are very small, and having them on your / partition costs almost nothing.
So files that are moved into the pool are not using space on your / partition, unless you added the / partition into the pool.
So I'm guessing that, as soon as the file is copied to the pool, it removes the file from the system drive and replaces it with the symbolic link? Does this happen as soon as it has successfully copied the file to Disk1 in the pool, or when it has been also balanced to Disk2 (assuming that it's being copied to 2 disks)?
You are right, the System Drive is not part of the Pool, which is why I was shocked that it was being used whilst files were being copied over to the Pool via the network Share. I guess it makes sense that it would copy to a "physical" disk first, though before being copied to the pool, but I guess that also seems that a System Drive of only 60GB will not suit. Can the landing zone actually be one of the pooled drives? I've yet to find how to actually change this landing zone (still searching this forum...)?