You can find out more about a file by clicking the plus icon to the right of the file you're interested in. This will open a panel showing the description of the file the organizer who uploaded it entered, if they entered one. You can also see the date the file was uploaded and the type of file it is on the right.
File repositories can have complex folder structures -- folders within folders within folders. To see what's in a folder, click on it. To go back up a level, click the "Up A Level" link at the top of the file list.
We also provide breadcrumb navigation at the top of the file list, to quickly access any level above you in the folder hierarchy.