>> I really want to have a backup that works! what are my alternatives?
Did you try to low-level reformat the card using the program that the SD Card organization provides?
https://www.sdcard.org/downloads/formatter/
If that still does not work, try the microSD card that ZWO recommends (it is not an SSD; it is a microSD card, earlier called TF card). Amazon sells them in various bundles, for example:
https://www.amazon.com/gp/product/B07NP96DX5
The above Samsung microSD appears to be correctly formatted.
I use MacOS X and ApplePi-Baker, and have made many backups and restores (I back up every new firmware release). I primarily use ApplePi-Baker v1 and not the current v2 of the application (v2 may be working better now -- it had problems when I tried it a while ago). So you may want to check v1 version of ApplePi-Baker out too.
MacOS Disk Utility of course will not work. The standard MacOS can only see the partition that is called BOOT (the partition that holds the license file). There are three other partitions on the microSD card that are opaque to MacOS X; thus the need to use something like ApplePi-Baker to back up and restore the ASIAIR firmware.
Chen