Fundamentally a combination of PCI Express and DisplayPort, with substantial power supply, there are several reasons why you won’t get the whole 40 Gb/s from external storage.
FireWire
Apple wants us to run our Macs at Full Security and not use third-party kernel extensions, but refuses to build S.M.A.R.T. access into USB in macOS.
Have you just got a new Mac, or have you just ordered one to replace an old, ailing, or dead one? Here is advice on making the move from old to new.
Thunderbolt drive enclosures are expensive. Are they good value?
How can I get a Mac mini to serve files from our stack of five FireWire drives?
Estimated time to transfer 60 GB over Ethernet was around 24 hours. How can I speed that up?
Is it possible to access an optical drive using Target mode?
When I connect an old FireWire drive to my FireWire-USB adaptor, my MacBook Air complains it is drawing too much power. How can I use this disk?
Which would be better to hitch my FireWire 800 external drives to a new iMac: eSATA to Thunderbolt, FireWire to USB 3, or what?
In planning my migration from an old MacBook to a new Mac, am I right to suppose that Ethernet is the best way to connect the systems?
The Eclectic Light Company 