Cut and Paste
You can move a card, folder, group or section to another folder.

Long press on the item to select it and access the menu.

Choose "Cut" from the menu.

Navigate the folder structure as normal and press the red "Paste" button to drop the item into the currently displayed folder.

The pasted item will be placed in the first visible group at the top of the screen.

Note that this is NOT the procedure to move cards between different groups in the same folder. For that, click here