mandarcy wrote:
Aah I see so NVMe is just the connection bus? Those hubs I've seen connect to the Mac via a port on the back (Thunderbolt?) so I guess you wouldn't get the full speed of NVMe anyway would you?
It depends on the particulars of the case. There are some M.2 PCIe NVMe SSDs whose theoretical maximum speed exceeds what Thunderbolt 3, Thunderbolt 4, and USB4 40 Gbps can support. But connecting external NVMe SSDs by one of those three methods will usually get you speeds similar to what internal ones were for a long time.
Thunderbolt 5 can offer twice the bandwidth of Thunderbolt 3 and 4 – if both the Mac and the drive support it.
Macs do not support USB 3.2 Gen 2x2. Drives using it will fall back to (at most) USB 3.1 Gen 2 speed on a Mac.
Even a USB-C (USB 3.1 Gen 2) / NVMe SSD might be about
- Twice as fast as a USB / SATA SSD
- Eight times as fast as a mechanical hard drive with a USB 3 (or better) interface, which itself would still be fast enough to hold your Photos, Music, and TV libraries
when it came to sequential access speed.