Filter Panel: Please let us filter Photoshop PSB files
Right now, they are lumped together with PSD, as Photoshop documents. We have a workflow which sometimes leads PSB output (instead, as intended, to PSD). There's no way to filter these files out inside Bridge – we need to use Windows Explorer for this task.
Chris Page commented
If this is because you don't want it to preview the Large PSB files, you can change the Maximum Preview thumbnail to something like 1000MB. That way it would try rendering the massive files.
Pref / thumbnails / Do not process thumbnails larger than __