To access the folder options, press the options icon (•••) in the folder list.
In the folder option, you can select to have the folder available offline by pressing the device icon on right side of sync status.
Once this is pressed, the folder and its contents will start to be downloaded on your device.
By switching the setting off again, you will cancel the download.
The status of the folder will be indicated on the folder icon in the folder list with a green overlay icon.
The following options are available for the folder:
"Delete" will delete the folder.
"Rename" will rename the folder.
"Create link" will create a public link to the folder.
"Cancel" will bring you back to the previous screen.