I think that ASTRO is an amazing file manager, you can do so much with the files on the SD card and it doesn’t slow down the mobile when using it. You can cut, edit, delete, view etc your files if they are on your SD card and it even has three widgets for the home screen. It has been for a long time and it has developed a lot since when it was first released and it is the most stable and has the most extensive features that I have used for a file manager on Android.