I'm looking to buy a MacStudio soon but in the meantime I've already purchased a WD Black SN850X NVME Gen 4 SSD with a Thunderbolt external enclosure (Acasis TBU405PROM1) for video editing. For now I have an iMac 27" Retina 5K 2017 3.4 GHz with a 2TB fusion drive.
I did a BlackMagic test on my iMac and I got: 550 MB/S reading and 2000 MB/S writing
With the new Thunderbolt SSD I get: 2400 MB/S writing and 2375 MB/S reading
So far everything seems ok.
Then I tested copying a 2GB file from my iMac to the SSD and it takes 11.09 Sec.
But when I copy the same file from my iMac (from a folder copied to the desktop for example) it copies instantly, I don't even have time to start the timer. Why ? The Thunderbolt SSD is faster according to speed tests so how can we explain that?
I did a BlackMagic test on my iMac and I got: 550 MB/S reading and 2000 MB/S writing
With the new Thunderbolt SSD I get: 2400 MB/S writing and 2375 MB/S reading
So far everything seems ok.
Then I tested copying a 2GB file from my iMac to the SSD and it takes 11.09 Sec.
But when I copy the same file from my iMac (from a folder copied to the desktop for example) it copies instantly, I don't even have time to start the timer. Why ? The Thunderbolt SSD is faster according to speed tests so how can we explain that?