OH,
now I see!
That is how Windows works?
That is absurd!
Source: 76,639 items selected
Destination:
took forever before anything happened, simply a busy,
then eventually a "Preparing to copy..." dialog ... Calculating...
All the while, eating 100% of 1 core.
Come on. You've got to be kidding me!~
I'm at, at minimum, 10 minutes in, & not a single file has yet to copy, still "Calculating...".
CANCEL. (I simply can't take it any more.)
I'm on Win7.
As much as I might hope... I can't fathom that Win10 would be any better.
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Above, was "accomplished" using Windows Explorer, selecting files in Source, Ctrl+C, & attempting to paste to Destination, context-menu Paste.
The same "results" can be seen through Everything, selecting the files, Copy, then opening a Windows Explorer windows & Paste.
Ditto Everything's 'Copy to folder...'.
So Everything is relying on Windows facilities, & Windows facilities simply are not efficient (to say the least).
In my original testing, I was using Altap Salamander (file manager) & selecting, copy, then paste, from within there, & even though I took the Copy/Paste as a "Windows" operation, it must not be, it must still be within the confines of Salamander & doing it that way, one does not run into the Windows issues.
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So just how does one copy large data sets - using Windows facilities, in an efficient manner?
Command line, you can do it. COPY, XCOPY, Robocopy, XXCOPY, all start instantly.
But a Windows (native) GUI?
https://serverfault.com/questions/18125 ... wo-servers
https://www.online-tech-tips.com/softwa ... any-files/
https://www.raymond.cc/blog/12-file-cop ... fer-speed/
Still haven't figured out how to do it using Windows (GUI) facilities?