You can upload, keep and download different files to applicant profile.
If you want to do this, you need to:
Open Candidate profile
Click on Attachments tab (Note: if applicant has any files, there will be a count of these files on this tab)
Here you have this options to do:
Upload files: just drag and drop or click on Upload from computer
Download files: you can see the list of files, and to download just click on download icon
Delete files: if you don't already need some files, you can delete them