You cannot copy the SD card
before activation to another card because the card must have a certain
CID (
what is CID?). Even if you try to fully copy as a raw image, it's not about the files on the card, but the card CID which
can be written only once on most commercial cards.
Even
after activation (i.e. locked VIN), if you backup via Toolbox and restore on another card it may not work. At least that's been my experience in a 2021 CX-5. I made a backup and restored to another card, Toolbox is happy with the new card, but the car is not, I cannot get the Nav to work with the backup card.
Watch this video on this page how they make these clones in China that you find on the cheap on ebay/Amazon:
This product is no longer available.
www.alibaba.com
Easiest solution seems to be to spend $50-60 on one of these cards and get it over with, rather than trying to make your own clone.
I don't care much about the Nav in the car when I have Waze on Android Auto, but it's good to have it as a backup just in case.