This icon is a file folder symbol with the wi-fi network symbol in the upper right corner. The wi-fi symbol has been transposed to fit within the corner and it is shown upside down with the smallest dot at the top rather than the bottom. The wi-fi symbol is also at a 45 degree angle rather than straight up and down which is how the icon is normally visualized.
This is a FTP icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,900 icons, all in the same style and quality.