SanDisk has just released the SanDisk Memory Zone app which allows you to managed all of the contents on your phone's internal storage and also SD card (of course) by managing it (such as moving around, copying, etc) or even uploading/downloading from any of your existing cloud services such as Box.net or Dropbox. One of the neat features that the SanDisk memory zone provides is the ability to schedule backups to the cloud, so you don't have to worry about losing your data. You can also password protect files and folders should you need to keep them away from prying eyes.
What makes this app great is that its an all in one app and you just really need this one app to help you manage all your stuff and backup to the cloud. Not only that, did I mention that its completely FREE? Yes, it is. Go grab it NOW:
SanDisk Memory Zone (FREE) - Android Market