Hello,
I found out today that I have no storage left on my google chromecast. I don't store any files locally on the device and just have the standard set of apps (Hulu, HBO Max, Netflix, etc.) yet somehow I am out of storage. I checked in Android settings and none of the apps are taking more than ~100MB. I also downloaded Fx file explorer and it did not find any large files. I suspect some cache is not getting cleared and so I've run out of space. Is there any other option than to perform a full factory reset?
Clear the cache on all apps individually first..
Settings- apps- pick each app and clear cache manually.