[Nexus 6P Android Development] knightware2001:
Thanks for the reply. Sorry... Didn't think I was being vague on that, but it as late at night and I was pretty tired.

Yes I know you can't update a custom ROM with a stock update. You also can't update a stock ROM with a stock update if it uses a custom recovery like TWRP (I've tried in past and everything needs to be stock). However there is usually a way to apply the update. Usually a compatible custom version of the update or in the case of stock with custom recovery, a repackaged version of the update you can install with TWRP or other tools. So how do I either update this to stop the message telling me there is an security update from appearing ( such as a compatible update that would work with the custom ROM as most ROMS have) or how do I stop the update message from appearing. With root access there must be a way to block the security update message from constantly prompting me to install. It's annoying to have it keep appearing at the top of the screen bugging me for an update. There has to be a way to stop the phone form looking for an update to begin with??

The OTG question was in regards to the "on the go" support. Basically I can pull a memory card out of a camera and plug it into the OTG cable attached to my Nexus and then look at the pictures, transfer them to the phone, online, email, etc... all while nowhere near a computer. I can also transfer files from the phone to a USB drive that plugs into the cable that is plugged into the phone. Nothing to do with using the phone as storage as that works fine. It's about using external USB storage on the phone. (USB thumb-drives, memory cards in a USB adapter, USB External Hard Drive, etc...). There are occasions where I need to give someone files from my phone onto their thumb drive as it's just quicker and easier. Other times there is simply no WiFi in the area and I don't want to use up my entire data plan and a who knows how long trying to transfer several large files. Sometimes simply in a area with no service or WiFi, we do have a USB drive. Another example would be having a 256 GB thumb drive with tons of videos and I'm in a camper with no WiFi internet connection. I can pop in the drive, transfer a few shows or movies I want to see to the phone. Pop the phone into a VR headset and enjoy a theater like experience in the middle of the woods. Then delete the files from the phone to recover the space. It's just a useful feature that didn't work with this ROM.

I figured that out though. It was the Kernel (like I thought) not supporting OTG connections. The ROM was fine, but that's one one part of the equation. Both ROM and Kernel have to support external storage. In this case I replaced its kernel with ElementalX kernel everything worked fine again. I can plug a USB drive into my phone and access all the files on the drive or transfer files to the drive without a computer involved at all and no need for wifi or data usage. Overall so far this ROM and ElementalX seem to work great together. Pretty peppy and responsive compared to stock. Also much better battery life so far.

Now if I could just stop the constant update message that is bugging me at the top of the screen.