Folders are a great tool to help keep your emails organized so you stay on task and can easily find emails.
Once you have logged into RoundCube, click on the wheel in the bottom left corner and choose 'Manage folders'. Click on the blue "plus" sign in the bottom, center column to add a new folder. Name your folder whatever works best to keep you organized.
You can use the "Parent folder" function to add folders inside other folders (Parent folders). When you have finished, click 'Save'.
In the 'Folders' section you can also turn folders on or off by clicking the checkboxes next to the list of folders.