it’s been proven that you don’t need 960 pro ssd for exporting. even a cheap sata 3 SSD is fast enough for exports.
1. boot drive: OS,programs, Windows page file, ,exports, and media cache/cache files
2. 960 EVO NVMe drive: media, project files, previews, AE ‘global performance cache’
3. 7200RPM WD drive should only be for backup of important media , project files and archiving