Disk Space Analyzer allows you to collect files in a special list to further manage them. You can copy, move or remove selected files and folders. There is a special panel for selected items.
disk space analyzer with Select Files option highlighted
To add files to this collection you can drop items right from the diagram or select files in the Biggest files panel.
disk space analyzer window with selected files for operating
Then you can manage the selected items by clicking to remove them or copying or moving them to any desired folder.
When you click to move or copy files, the app will display the Finder window where you can select the new location. Choose a new folder and click the Select button.
removing or moving big files with Disk Space Analyzer
If you click to remove selected items, they will be physically moved to Trash.
Also, you can use the Menu Bar to operate selected items.
using menu bar to move folder using disk space analyzer