Hi I am trying to add Discovery+ to my Roku modle 3050X - Roku 2 XD and keep getting Channel Install Failed errors. I have tried add from my device and from my account online. I have updated and restarted multiple times. Any advice on what I can try or what i am doing wrong? Thanks!
That model is too old to support Discovery+ or any of the newer channels. There's nothing you can do other than buy a new model.
You can add anything you find online via the Roku Channel Store web page to your Roku account. A channel will only download from your account to a device supported by the channel app, however.
I can't yet find any info specifically on which Roku models Discovery wrote their Discovery+ app to support, it's probably too soon, but here's what Discovery Go says it supports so Discovery+ may be the same :
Roku