Topic: Hakchi on SNES Classic Mini

I am running Hakchi v3.5.3 on my modded SNES mini, and I'm finding compatibility problems with "how to" guide videos on YouTube, to get arcade ROMs working. Can anyone help with getting non-SNES format ROMs working on the SNES Mini?
I used to be able to get most things working in the old version of Hakchi, but thought it would be better to run the improved, update.

Also, I have a USB drive and external micro-to-large port USB adaptor so I can store all the games with no space compromises. Does anyone know how to make this work?

Many thanks in advance.

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