No, there is no easy way to sort the files within one folder... If you reload the folder, they will appear by alphabetical order of the files, not by the order of creation, this is the only thing you can change.
Two solutions for easier sorting can be used, but need to think about it in advance.
- Add tags to the files after they are created, so you can easily get them with the search box or the selection processes:
https://neuroimage.usc.edu/brainstorm/Tutorials/PipelineEditor#Control_the_output_file_names
https://neuroimage.usc.edu/brainstorm/Tutorials/Scripting#Running_the_script_again - As you go, move the files in other folders than the intra-subject folder.
The group analysis tutorial uses both solutions, you have the GUI version illustrated in the page and the scripted version accessible at the bottom of the page:
https://neuroimage.usc.edu/brainstorm/Tutorials/VisualGroup#Sources
https://neuroimage.usc.edu/brainstorm/Tutorials/VisualGroup#Group_analysis:_Sources