These days I use so many different devices that it’s much more convenient to sync files to the cloud, rather than using my old external HDD. Dropbox has a nice policy where they explicitly state that they aren’t going to go through your content for marketing (or any other devious) purposes.
I don’t have any porn and I rarely rewatch movies or TV series. My video content is mostly live performances of music and a couple of documentaries that I haven’t gotten around to watch yet.