I have two questions. First, where can I find a tutorial for group analysis. I need to compare people with and without trauma exposure in PSD during baseline and a cognitive task. Can you show me the link to the relevant tutorial? Second, I wonder if I can store my EEG data on an external hard drive and work in different places using different computers(both home and work)? I sometimes needs to do analysis and pull up the results at home. I copied the brainstorm_db folder to an external hard drive and reset the path to the db folder, but it didn't work.