Root Explorer is one of those apps that has been on each and every one of my Android devices for years, and part of the reason why is that developer Speed Software has kept it relevant with near-constant useful updates. The latest, version 3.3, takes advantage of the revised SD card management on Android 5.0. Those with Lollipop devices can once again write to an external SD card even without root.
Root Explorer is a solid file manager, but - surprise, surprise - it's even better for people who have rooted their phones. Back when Android 4.3 first arrived, many root enabled file managers suddenly had broken root support, but not Root Explorer. And since the functionality is already so solid, the latest update introduces a new feature some of us would consider superfluous. If you like Root Explorer, now you can make it prettier, look more integrated, or be as obnoxious as your eyes can handle without permanently rolling over backwards and staring into the darkness between your ears.
Root Explorer is a favorite among power users, including yours truly, for its no-nonsense approach to file management on Android. That said, the app was getting a bit long in the tooth before today, with a stale UI and a lack of new features. Developer Speed Software has released a major update to Root Explorer with a ton of new content, including a revamped user interface, networking and cloud storage options, and background processing.
If you've visited Android Police over the past weekend, you've probably already seen my enthusiastic review of Total Commander for Android, which for me is replacing both ASTRO and Root Explorer going forward as the top Android file manager. Ad-free, $0, root support, dual panes, plugin support, and other advanced functions, which you can read about in the review, make Total Commander an easy choice for both novice and advanced users.