Both are MicroSD with Adapter.
64 GB card is an ADATA https://www.sanborns.com.mx/producto/44303/tarjeta-adata-m-sd-64gb-c-10/
128 GB card is KINGSTON https://http2.mlstatic.com/memoria-microsd-128-gb-kington-clase-10-D_NQ_NP_829520-MPE32067470913_092019-F.jpg
Used MinitoolPartition wizard to do the reformatting task, File system: FAT32, Cluster size: 32 kb. Other options are the default ones.
I didn't experienced any issues, was using a 64GB card and now I'm using a 128 GB card.
Did you hacked your console? do you know which boot9strap version you use?
Last versions of luma are not compatible with the old boot9strap versions.
Luma 10.0.1 is for the last version of boot9strap AND update 11.8 https://github.com/AuroraWright/Luma3DS/releases/tag/v10.0.1
Luma 7.1 is for...
Kuroshitsuji: Phamtom and Ghost with translation patch runs fine, but the save data is always corrupted everytime I load the rom. Would you check this, please?