Workbook - Save Item(s) As

Ribbon bar. Select one or more items in the workbook tree view, and on the Workbook tab, in the Items group, click Save Item(s) As to display the Browse for Folder dialog box...

Classic menus. Select one or more items in the workbook tree view, and on the Workbook menu, select Save Item(s) As to display the Browse for Folder dialog box...

...where you can select the destination folder for the workbook items. The directory structure in the workbook is recreated in the destination folder.