Does the anyone know if the new M5 support the faster USB - up to 2000 MB/s ?

You're talking about USB 3.2 Gen 2x2 – which runs at "up to 20 Gbps" a.k.a. "up to 2500 MBps" (before overhead). USB 3.0 runs at "up to 5 Gbps" a.k.a. "up to 650 MBps". USB 3.1 Gen 2 runs at "up to 10 Gbps" a.k.a. "up to 1250 MBps." The "Gen 2x2" is important here: "USB 3.2" by itself does not denote "up to 20 Gbps" speed.

I don't know of any Macs that support USB 3.2 Gen 2x2. Apple's Technical Specifications make no mention of the highest USB 3.* speed that the M5 MacBook Pro supports, so my guess is that that Mac doesn't support it, either. I'm guessing that the M5 MacBook Pro supports USB 3.1 Gen 2 and that if you connect that SSD to a M5 MBP, the two will negotiate a transfer speed of "up to 10 Gbps" / "up to 1250 MBps" (before overhead).

That Mac – like all Apple Silicon Macs – does support

• USB4 20 Gbps (by implication – my understanding is that it is mandatory for USB4 host ports)
• USB4 40 Gbps
• Thunderbolt (in this case, Thunderbolt 4 (up to 40 Gbps))

At the lowest levels, USB3 at 10 G bits/sec and USB3 at 20 G bits/sec are running at EXACTLY the same data rate across the cables. They use exactly the same spec cables.

The difference between USB3 at 10 G bits/sec and USB3 at 20 G bits/sec is the ability of the Ports at BOTH ends to "turn around" the use take over the nearly-idle inbound or outbound data pathways and run momentarily all outbound or all inbound.

This adds enormous complexity to the controller chips, and does not necessarily overlap with those functions for ThunderBolt capable ports.

The closer you get to any theoretical speed mentioned in an advertisement or marketing page, the less likely you are to reach it in real life. There are simply too many options.

I can tell you that your external drive either: 1) won't work, 2) won't work well, or 3) will work fine, depending on literally dozens of different scenarios. Some of these scenarios you have control over, some you don't.

I can also tell you that in no case with the external drive be anywhere close to the speed of the internal SSD. Technically, this is possible, but it's extraordinarily rare.

What are you planning on doing with this drive? That's the big question. Give us that information and we can give you a better idea of whether or not you'll be happy with it.