Custom Flashcart says "Can't open _dsmenu.dat"

[EffoVex]

For reference, I bought one of those 201 in 1 game cards off Temu for my DSi, Realized I can customize it. So I started looking online for more emulators so I can play More than just DS games on my DSi. And downloaded the files. These are the files I downloaded from a guy on YT who had a tutorial and provided these files to download. Am I missing something? What needs to be added?

 

[anotherthing]

Most of those XXX in 1 cartridges are Ace3DS+ clones. That looks like R4i firmware. Before you start modifying the software on those cards, it's a really good idea to back them up first. In fact, it's a really good idea to back up the software on the SD card and then get a decent SD card to replace the card that's on there with something like a SanDisk or Samsung SD card.

 

[SylverReZ]

Most of those XXX in 1 cartridges are Ace3DS+ clones. That looks like R4i firmware.

R4i firmware is none other than hacked up DSTT firmware, but they've added timebombs and all sorts.