Steve wants to know what hard drive is the easiest to search data with. Leo says that all the major manufacturers use shingled data storage, which is terrible and unreliable. It's also slower. So Leo doesn't really have a favorite anymore. Use what you can get that has a decent price, and stick with name brands.
Gary has an HTC One with Beats audio. He has over 5,000 contacts and his phone won't let him search through them. Leo says that's likely because HTC has replaced the Google contacts app with its own, which is a problem. Google has started to release apps like Calendar and Docs on the Google Play store, but hasn't released the contacts yet. They probably won't, since people mostly use the phone's dialer for that.