we already have a source on the music lol it's from Time is All We Need by Jessica Jay https://www.youtube.com/watch?v=p4F0rX_82t0
well this card is full of half regular old pirated NES ROMs with names round-trip translated and truncated so you can barely tell what they are. The other half is a lot of anything scraped from anywhere including plenty of classic crude romhacks
Unfortunately unlike similar devices this does NOT seem to have a standard SD card file browser, or at least the trigger for it is different. The menu for the 1000 in 1 is hardcoded & the stock card files are obfuscated, so you could swap out the roms if you can find them but not change the names