Numbers File Problem

Put the file where you want it in the "Finder" (the equivalent of Windows File Explorer) and, then, switch to Numbers and use the menu item "File > Open…"

now navigate to the file, then select the file.

Now that file should appear in the recent items folder. You don't "put" things in the recent items list you open them and the list is updated because of that.

Go to Finder, open a new window, navigate to the location you want to place the file.

Open a second new window. Navigate to the copy of the file, select it, and drag it to the first window. The Mac will either relocate the file to the the place you dropped it or place a copy of the file at that location.

Regards,

Barry

If you want to access the document from more than one Mac then perhaps the most convenient approach is to save it in iCloud Drive. Both Macs need to be signed into the same iCloud account (System Preferences > iCloud) and iCloud Drive needs to be turned on and Numbers.app checked after clicking the Options... button next to iCloud Drive. After that you won't have to guess where you might have saved your document, and no fooling with USB sticks, etc.

A bonus is that you can also access the document from iOS devices.

SG