Very useful - thanks.
I used my Windows PC to copy from my current backup, a 2TB HDD and a 3TB HDD so all that had been done, the libraries updated and a backup made which to me, with the info you've supplied, says an external event.
Once I've copied all the files back across I'll download whatever the latest nightly is and have another go.
I'm hoping to get everything up and running before October which is the 1st anniversary of starting the process <VBG>