While it is certainly a snap to add files to your MediaFire account from the Web, the Android app lets you do so from your mobile device almost as easily. From the sliding menu at the bottom of the screen, you can upload photos from your Gallery, or you can take pictures or record video and automatically save them to your MediaFire account. There's even a built-in file browser, which lets you upload from other parts of your file system. In my tests, MediaFire synced files to the cloud reliably and almost immediately, whether files were being added from the mobile app or from the desktop.
To keep things organized MediaFire offers buttons for creating new folders and moving or renaming items as needed. Unfortunately, what is missing here is the ability to batch upload items, which is pretty painful considering the 50GB of storage space available.
To manipulate individual items within MediaFire, simply tap the small arrow next to any on your file list. The arrow brings up options to move, rename, delete, or download files, or even make files private. It also houses your all-important sharing options. Conveniently, MediaFire lets you share file-download links directly to other applications you have installed, like Gmail, Drive, Pocket, Facebook, or Evernote. Alternatively, you can copy the download link directly to your clipboard for pasting elsewhere. While this Share feature is certainly one of MediaFire's most useful tools, I would still love to see an Export feature similar to Dropbox's, which would let you attach files directly onto e-mails.