Problem: I wanted to find an easy way to transfer files back and forth to my G watch and I could not find a way to connect as a MTP device in Windows or in TWRP. Although ADB push/pull commands are easy enough, it is a bit cumbersome when copying over a bunch of songs. Also copying and moving files on ES file explorer is a bit tedious.
After trying a bunch of things out, I found a solution that may help others.
Solution: Android Commander, a windows(GUI) based ADB file explorer.
The dev's website is down, but you can find the download on the facebook page: