Press the OneDrive icon on your taskbar. Select the gear icon in the upper right corner. Choose one of the available options ...

restart your computer and see if you can delete it. If not, here are a few things you could try. Double-click on NameSpace and check inside each of the GUID folders. If you can identify the icon ...

For example, you may see a white color default icon instead ... them as they may interfere with the files or folders and corrupt the icons. It could be possible that the installed custom icon ...

When you no longer want to see them click Command + Shift + . again. Another way to keep the hidden ~/Library folder visible is to drag the hidden Library icon from the Finder window to the Finder ...

If you want to look through an SD card of pictures, however, you'll want big icons to see what each picture looks ... makes it easy to make the icons in a folder larger or smaller.