Is there such a thing as default window size for Finder on macOS? On Windows, if you resize any File Explorer window, all new File Explorer windows open at that size. Whether it is a new USB Drive, new folder, etc. does not matter. On macOS, every Finder window wants to open at some small size and it is driving me crazy. I have one external hard drive. I plug it in. I resize its Finder window. If I unplug it and plug it again. It again opens in a very small sized Finder window.