Depending on how the set is curated (regions, duplicates, and file types), the total storage requirements vary:
For users looking to store these libraries on actual hardware, the 3DS has specific technical constraints: 3ds Complete Rom Set Size
To give you a more concrete idea:
: SD cards larger than 128 GB often cause slower menu load times and potential graphical issues with GBA virtual console titles. Depending on how the set is curated (regions,