I see ads for them on TikTok and they exude scam vibes. I’m aware that putting a fully loaded emulator on a usb connectable device is possible, but there’s no way all of them are legit. Have any of you bought one? Does it work well? If so, which one?
Most of them are usually some bootable Linux distro/emulator/frontend suite, such as Batocera or Lakka. Unfortunately I can’t speak for which ones are good or shit. There’s also the possibility of the cheaper ones having some kind of malware payload on them; definitely don’t plug one in to a desktop/notebook that you care about.
If you’re tech savvy and already have the game ROMs, you could actually build a Batocera USB stick yourself and load the ROMs to it. There are lots of tutorials on YouTube etc.