Best or system-kindest way to copy my old QNAP's data over to my new QNAP NAS

[Agarthan]

Yes, but *which* "built-in file transfer tool"? ...there are a bunch, as you highlighted in a recent video on your YouTube channel.

This will be a one-off copy of all NAS files from one big unit to another. No scheduling or complex setups are likely to be needed - just the best software tool from those QNAP makes available.

So - any tips on which one that would be?

HBS3? HybridMount? Qsync? Just copying stuff between both NAS units via SMB using good old Windows Explorer?

That last option is deffo the one requiring the least thought by a typical Windows user such as me (though I also run Linux Mint and pretend i know what I'm doing), but I imagine dragging literal terabytes between SMB-mapped drives is not the preferred way to go - nor the one that will be kindest on my [likely overworked] WD Reds!

Can you please say what method YOU would use - especially if certain folders were more precious (e.g. family photos and videos) and thus a priority to copy over than others?

P.S. I intend to never connect either NAS to the internet. It's just better to be sure

Thanks again, Agarthan, Oz