My current libraries (a mixture of Aperture and Photos) sit on a 3 TB external HDD that gets about 170 MB/s in read/write. Libraries take up about 500 GB in total. My problem is that I feel I'm waiting for the disk to catch up a lot of the time. Would a SATA III/ USB3 SSD such as the 850 Pro with roughly 500 MB/s been enough to help reduce this bottle neck? What if I looked into a NVMe drive by using Thunderbolt 3 that gets 2,000+ MB/s? Would I really notice the difference of a 2,000 MB/s drive vs a 500 MB/s drive when working with my photo libraries?