Windows recognizes device type by what the device says it is which in the majority of cases can be overwritten...
If you have plugged in an actual thumb drive (confirmed by observation) it could be because there is malware/virus on that device.
This is a technique used by impostor software to for example show up as a keyboard so windows will trust it automatically yet act as a key-logger...
Never had experience with a 'smart' toaster so it depends, did windows trust it (install and allow its usage) without any consent?
Note: this scenario is unlikely, but note it ;)