I did a circuitpython update on my Feather m0, not it will not go into booloader mode or show up as a USB drive or a serial port. If i double click the reset button it goes to slow dim blink for about 3 seconds, then back to a bright faster flashing light.
I am not sure how to recover from this.
Just to clarify i am not using a charging only cable, i currently have my trinket plugged into the same cable and it works fine. Any help would be great.