- 1). Click the "Start" button and select "Computer" to launch Windows Explorer.
- 2). Click the folder you want to add a sub-folder to. For example, click "Documents" to launch the "Documents Library" folder if you want to add a sub-folder to it.
- 3). Click the "New folder" button to create a new folder, then name it whatever you want and press "Enter." Alternatively, click the "File" menu, highlight "New," and then select "Folder" to create a new sub-folder.
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