An 8BA file is a Photoshop plug-in that adds additional features or capabilities to Photoshop or Paint Shop Pro (PSP). It may provide new image effects, add new photo filters, or add support for extra file formats. Some 8BA plug-ins are included with Photoshop, while many others can be purchased from third-party developers.
8ba files should be placed in the Plug-ins Folder within the Photoshop or the Paint Shop Pro application folder in order to be recognized by the program.
NOTE: Photoshop plugins now use the .PLUGIN extension.