Over in the Beatles custom software thread some of these SD card/writing issues have been discussed as well.
twenty84 mentions some interesting stuff related to Apple/Mac setups that may be useful.
https://pinside.com/pinball/forum/topic/beatles-sgt-pepper-s-lonely-hearts-club-retheme/page/2#post-5745276
For the Windows folks, I had really mixed results with Balena. The Win32DiskImager got the job done for me with both JP and Beatles custom images.