There doesn't seem to be much of a discussion when it comes to a good file manager/explorer for the blackberry's. The only two I know are epro and Mobile File Manager (from Rovemobile).
efile has a free version, but the interface looks pretty weak. They have pro version for $15, but its also looks like weak sauce as well.
Mobile File Manager looks pretty good, and has a lot of great feature, but $35 per device seems a little steep.
I'm still looking for other programs that are either free or at a decent amount to purchase that looks pretty good. Anybody have experience with these programs or other similar program, chime in.