I'd like some advice on the best way to accomplish this. I have an upgraded Mac Pro ('09 ->10) with several hard drives. Video card with no boot screen, using bootchamp. Currently 10.12.6, but would upgrade that first. I've been lazy about swapping my original GPU back in to do the upgrade. Hard Drives: 750 GB SSD in the second optical bay as the OS X boot drive. 640 GB Mac drive in bay 1 1 TB Windows 7 boot drive bay 2 3 TB split partition half Mac/half Windows bay 3. This setup is kinda odd as the drives were added gradually over time. I want to add a bootable Windows 7 500 GB SSD, bay 4 if possible, but things can be swapped. Will need to use bootchamp with High Sierra(that still work)? Is there anyway to transfer my existing Windows installation to the New SSD?(trimming it down to under 500GB first) Am I stuck with a new install? Any kind of cloning options? I don't think I have my W7 install disc anymore, is it downloadable somewhere if I need a fresh install, and can I use my current serial? Are there issues with any SSDs being Windows bootable? Do I need a certain brand, model, or bay location?