Here is list of best android file manager so far for htc.
Astro File Manager pro and Lite Version
Download
Download
Root Explorer(Paid Version)
Download Astro File Manager pro and Lite Version
ASTRO File Manager helps turns your phone from a toy to a tool.
This new permanent version includes mobile ads. The ad free version, ASTRO Pro is available below (see 'View more applications).
Features: File Manager, Backup, Image and text viewers, Networking, SMB, Bluetooth, SFTP, Zip Tar, downloader, thumbnails, search files, application manager, task manager, attachments
Download
Root Explorer(Paid Version)
Fast, lightweight and easy to use file manager. Perfect for organizing your SD card contents.
Includes multi-select, zip file creation/extraction, text viewer/editor, search, bookmarks, email, home, image thumbnails.
Download