Why has download manager popped up in my notification window, yet nothing is downloading?

[Wapani01]

This morning, when I turned on my android Samsung Galaxy S8, the downward facing arrow showed that something was downloading into my phone. When I clicked it, nothing came up, so I clicked the details button. It only showed that I could stop seeing notifications or not. It didn't reveal which apps or files were downloading. It looks very suspect to have something arbitrarily downloading into my phone, yet it won't allow me to see what that is.

 

[Rukbat]

The arrow means that data is coming into your phone, not necessarily a file. It could just be part of the phone connecting to the network.