This is the Dodaj plik icon for Windows 10. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.
This icon looks like a piece of paper, but the top right corner has a single fold toward the center as if someone has just turned over the edge with their fingers and in the bottom right corner there is a 'plus sign' inside a circle.