This is FTP-like module. You can create directories, upload, edit and delete files through module interface.
If you have co-admins or sub-admins on your site but cannot (don't want) share your FTP account, this module could be solution for you. Especially it can be useful if you use Subjects module on your site (v2.0 release coming very soon). EW FileManager can bring additional functionality to this great module.
First of all set *Set ABSOLUTE path to files directory:* to directory you want FileManager be able to work WITH "/" at the end. E.g., for Windows it can be d:/www/pn-site/modules/subjects/pages/, for *NIX - www/htdocs/www.site.pn/modules/subjects/pages/
Module will not able to go upper then directory you've pointed in a module configuration except directories you designate for certain user.
You can permit user to work with FileManager in the directory appointed for him (her). User will able manage directories and files UNDER given directory, not above. But you have to give additional permissions to user for the module in [Administration]-->[Permissions].