I've verified I can see the current hard drive on my Ubuntu box, the directory organization is straightforward. So copying from old to new on that box would seem to be pretty simple.

you'd probably be able to get away with disconnecting the original drive, then hook up the new/larger drive to the ...

Thanks for the Linux suggestion, I have an Ubuntu box I use for MythTV so I can mount old and new (after initializing the new on Flex 4k) and copy across there, then put the larger drive back on the Flex 4k and hopefully all will be good.

Thanks, that's too bad, it would be nice to reuse old drives to add to storage. I don't want to use NAS storage for media and in any event with ATSC 3.0, storage requirements increase significantly regardless. If I have a pair of mirrored 1 TB drives on my legacy NAS, I'm still short.

So it seems ...

I have a Flex 4k with a 1 TB hard drive connected to the USB port. It works great.

I know I can replace the hard drive with a larger one to get more capacity. But I already have another 1 TB drive that I would like to connect to double capacity. I could simply use a USB hub to connect the hardware ...