Short answer: I doubt there's anything like it Long answer: According to the BIOS, there are two USB devices, the USB-C port on the top, and Bluetooth (which weirds me out a bit, thought it would be integrated into the WiFi module). If you do an lsusb, you get something like this: [código] As you can see, my USB 2.0 keyboard shows up on Bus 001. However, if I plug in an external SSD which properly uses 3.0, it jumps over to Bus 002, and if I plug in a 3.0 hub with built-in ethernet, and plug the 2.0 device into it, it shares those between 001 (keyboard) and 002 (hub and ethernet) -- I don't know the exact specifics of how USB is handled on Linux, but from brief experimentation it seems like 001 and 002 form a pair, and 003 and 004 form another pair, giving us two 3.0 slots, one of which is used internally. There is a very slight chance they left a debug port on it on some of the internal connectors, since we know it can handle multiple devices, but given the layout of the device it's very unlikely. It's...

Yep, I put a 256GB WD SN530 into mine, works absolutely perfectly. Make sure there are no chips on the backside of the drive though, it's a bit tight in there, but the BG4, being a single-chip SSD, would definitely work.