Manage your files with ‘Astro File Manager’:
Android phones do a lot of things well, but file management generally is not one of them, not immediately out of the box. Astro File Manager is free, fully functional, advertising-supported version. There’s also a $4 Pro version without ads.
Astro contains file explorer, archive manager, backup utility, and task manager all in one application. . It also has optional add-on modules to extend its functionality: Astro SMB Module allows network browsing, copying, and pasting of files on a Windows or Samba server, and Astro Bluetooth Module adds OBEX FTP support for browsing devices and sending/receiving files using wireless Bluetooth networking.
You can edit file names, copy/paste, select multiple items, create .zip archives with it. Its search function allows for some advanced parameters, including specific folders, subfolders, file size, older/newer than, and exclusion. You can save folder locations as bookmarks. Astro also includes a Process Manager. In this tool you can see which apps are running and how much memory they are using. You can also kill apps here.