I seem to have some hidden data it seems on the pool that’s not showing.

I know I recently removed one of my pooled external drives and transferred data to it from another pc, thinking I could reattach and simply transfer the new data to the virtual drivepool hard drive, but the files aren’t showing on the drive at all that I can view! When I hooked it back up to the Drivepool pc!

Any ideas what I can do to fix please, as I haven’t a clue!

:)