I have to share this, and it may already be common knowledge in the group. Maybe it's even in the sBitx manual that I did not read yet.
Spent a lot of time attempting to make a backup of my original SD card supplied with the sBitx kit.
Used Belina Etcher, Raspberry Pi imager and Win32Diskimager and was not able to make a copy.
All three of these apps reported that my new SD card was "too small" for the sBitx image.
Finally got it to work with the SD Card Copier that is on the sBitx and maybe all Raspberry Pi's running Raspberry Pi OS.
Just look in Accessories and run SD Card Copier.?
Pick the internal SD card as the source (the name will be something like: SE32G (/dev/mmcblk0)) and the Copy to Device as the SD card you want to copy to.
You may have to put the new SD card in an adapter and put it in the USB slot before bootup for the system to see it.
So best make a backup before mucking around with the system.