Since these are fan-made patches, they aren't available on official storefronts. The community typically shares them through enthusiast hubs:
High-profile FMR speedrunners like GFC often maintain public pastebins containing direct links to the most stable 5-card drop ISOs and patches. How to Install and Play yu-gi-oh forbidden memories drop 5 download
(Need Help) Looking to play Mod 13, 15 card drop : r/YugiohFMR Since these are fan-made patches, they aren't available
The fundamentally alters this by granting you five cards for every single win , effectively quintupling your progress and making the elusive "100% completion" a realistic goal. What is the "Drop 5" Mod? What is the "Drop 5" Mod
It provides a middle ground. While a 15-card drop can trivialize the campaign in an afternoon, a 5-card drop still requires strategy and effort to build a top-tier deck. Where to Download the Mod