Disk Experts lets you collect files into special list to further managing them.
To add files to the collection you can use Collection menu or press Cmd+D. You can Drag&Drop files directly from the Diagram or from the list of Biggest Files as well.
You can analyze and manage the colled items using the ability to transfer the collected items to other drives or even remove them to Trash.
When dragging away from the collection, the item will be removed just from the collection list. If You Drag&Drop files from Collection to Trash, the file will be physically moved to Trash.
You can copy the items, listed in the collection to any desired folder.
The command Move to Folder allows you to move the selected files to desired folder physically.