Idea of Downloading Updates Icon
It's a picture of an arrow pointing down into the bottom half of a rectangle with no top. The top of the arrow has three dots drawn in a line, replacing the top third of the solid line of the arrow.
This Downloading Updates icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,200 icons, all in the same style and quality.