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The Distribution of Users’ Computer Skills: Worse Than You Think (2016)
(www.nngroup.com)
This is a most excellent place for technology news and articles.
If i remember right, it's long-press on the notification, no? Currently on toilet, can't check.
Afaik last time I connected my phone via USB I needed to pull down zhe notifications and there was a silent option offered to switch the type of USB connections.