Can I restrict access to specific files?

Yes. You can restrict the access to specific files within a dataset while having other files of the datasets remain openly accessible. Please note that if you turn on the possibility to submit a permission request for a dataset, a user can request access to all restricted files of that dataset. If you have a situation where you want to prohibit access completely for some files while allowing other files to be accessed with a permission request, please contact one of the Data Station Managers and they will think of a suitable solution for your case. If you want to know more about filing restricted access data, you can consult this guide.