FX 1.2 is now available on the Play Store: https://play.google.com/store/apps/details?id=nextapp.fx
The major new feature in this release is "Usage View", which is designed to help you determine what files/folders on your device are taking up the most space. It shows information about the content and size of each folder in a file listing. It additionally displays information about what type of files are in a given folder structure.
Usage View is accessible from any local file window (it can't work over a network). To access it, tap the View menu and select "Usage View". Usage View is disabled when you exit a file view. It's not a "permanent" mode yet like "Icon View" or "List View".
Usage View adds a graphic indicator next to each folder/file showing its relative consumption of space. The indicator is on a logarithmic scale. It's intended to show relative size. For example, the Android folder in the screenshot above is consuming 15% of the space, but the indicator is nearly 3/4 filled. Something using 15% of your storage space is quite large.
Above the files is a horizontally scrolling toolbar (but on a tablet such as this Nexus 7, it doesn't need to scroll). The first pie chart shows how much space the current directory is using relative to other folders and free space on its storage medium. The second pie chart shows the percentage of space occupied by each class of file. "Documents" include plain text files and content types of common Office/OpenOffice documents.
Usage View also works as the root user. The display when using root access is a bit different. The breakdown by file type is removed. Mounted filesystems are shown with Pie charts indicating their used/available space:
FX 1.2 also has improvements to its thumbnailing system. Thumbnails are now larger and cropped to a square form factor. Thumbnails are now shown on all cloud storage services with FX Plus (Google Drive, SugarSync, Box, Dropbox, and SkyDrive).