Plex Low Memory on Nvidia shield TV

I added an extra 120GB’s to my Nvidia Shield’s internal hard drive. I used the suggested one from Nvidia - Sandisk CZ48 128GB USB 3.0 Flash Memory Drive - SDCZ48-128G-U46 I set up plex with a few TB’s of content. I keep getting the message that my internal drive is too low. I checked and I should have an extra 80GB’s left. I read that plex will only tap into the internal drive and not the extra I added. Is there anyway around this? Is this the source of my problem?

You might want to look into these support articles…