It depends on the drive really. The portable one USUALLY are, though sometimes they do need two ports, the second one to provide a little additional power. So I would start small with maybe a single test drive from a retailer like Amazon with a pretty flexible return policy (if it doesn't work with your TVs, you just pay return shipping). If things work, great, you can order more of that same make and model drive. If not, you try a different one or go to one of your fallback options.