If you have files in a Collection and you would like to move them to another Collection, or you have added a file to a Collection by accident - you can move those files using the Stockpress move tool.
Select the files you would like to move and click the ‘move’ icon from the action bar at the bottom of the screen.
Search for, or navigate to, and select the Collection where you would like to move the files. You can also create a new Collection by clicking the green '+' icon.
Your files are now moved to the new Collection.
If you would like to move a single file, hover over the file and click the ‘move’ icon. Follow the same steps as above and your file will be moved to the new Collection.