Issues transferring files to laser engraver

I have a Tounjen CO2 80W Chinese laser engraving machine, and I am having a lot of trouble transferring LightBurn files (or any recognizable ones for that matter) to it. Initially, I tried exporting various file types via a flash drive from LightBurn on my Windows 10 to the engraver (I did a manual setup for the device option, maybe this is the issue?) and none of the files were recognized when the U-disk was plugged in. Afterwards, I tried hooking my Dell XPS 15 to the machine and connecting it on LightBurn via USB cable, and the cutter couldn’t be recognized. The only files it shows on the cutter are two preloaded .out files, I don’t know if this helps. I would greatly appreciate any recommendations on how to resolve this ongoing problem.