Having been thru a very nasty divorce over 25 years ago, I wonder how a person could protect him or her self from a divorcing spouse. I can see how an innocent person could be set up to take a fall. A lot of crap could be downloaded and hid on a computer. Your best bet is to use an OS that requires a username/password for each user, and make sure that you keep your password secret. Then if your spouse downloads and saves illegal material on the drive, the files will all have his/her account identified as the owner of the file, regardless of wherer they are stored.
Thank you for your answer. I see another problem when a man uses a private user-name/password. That would be seen as an admission of guilt by many spouses. “Honey, what are you hiding from me. Don’t you trust me.” ;0)