@dantemugiwara. Leí esto en los foros de kodi, a ver si te sirve.
Just gave Kodi 21 omega on LG C2 webos an install, plugged in usb drive and also no detection.
I did however read reapers instructions and comment above, so I ran Web os dev on my PC connected to same wifi network as my LG C2 is and installed homebrew and kodi from the app list on web os dev app.
Rebooted LG C2 TV, ran Kodi and then followed his directory path so click:
Enter files section (under movies tab), Add videos button, Browse, Root file system, temp folder, USB folder, sda, sda 1 and then clicked ok and then ok again to add that sda1 folder to the kodi list of folders
it now sees all my video files fine and plays it.
Sadly Kodi 21 omega on LG C2 plays audio out of sync so while its an amazing (thanks to all involved in project) can't sadly watch any video file if its out of sync, will stick with the humble out of date Nvidia Shield.
I do look forward to if it ever gets fixed, since Id love to sell off the Nvidia Shield due to countless wires and power usage, Webos Kodi looks excellent directly off the LG C2 otherwise.