What suggestions are there for an SSD, probably 1 TB? Perhaps 2? Adaptor for the drive bay or PCIe? This? https://eshop.macsales.com/item/OWC/DIYMP9S6P1TB/ I have a Mac Pro 2009 I upgraded to 3.46 5,1. I have a music studio. I want to upgrade my OS/App drive to SSD. I only have SATA 2 TB drives. My configuration right now uses all four drive bays: Bay #1 2 TB SATA OS/APP/Docs/Itunes/Movies. Bay #2 is a clone of that. #3 bay is my audio drive. This is where I record and storage audio #4 Bay is a clone of that. Now I know how wildly inefficient this is. I'm going to JUST put my OS and applications on the SSD drive, probably Bay 1. Or get a PCIe card. Is there a preference? Then I'll put all my docs, iTunes, photos, movies etc on the Bay 2 drive, or other. Audio - maybe I should get another 1 TB SSD drive just for audio and back up to Bay 4 or external.