Thanks.
First, to be clear, it's an internal hdd using SATA connection. It will be permanently resident in the Libreelec box.
I wouldn;t be connecting it to the Windows machine, except via the network.
I assume this means I could format the drive as EXT4 on the Libreelec machine by accessing the command interface?
Would I need to mouny it or would Libreelec do this automatically on next boot?
Then after that I can set up Samba and copy files over through the network
It's the only thing that puts me off about this. You need to know Linux to some extent. I worked in IT so I know Windows of all flavours (and before that VAX/VMS!) but not Linux.
A quick google starts talking about having to edit fstab to contain the mount command etc. I'm retired and don;t fancy learning a bunch of arcane and frankly unfriendly commands.
It's why I' also considering just buying a commercial media box.