iPhone 15 Pro No USB 3.0 speed when restoring from backup w/ Apple "Pro" Cable

[Nik]

Hi,

I am using the latest Apple Thunderbolt "Pro" Cable for 200$ to restore the iPhone 15 Pro from backup. The backup is 750GB in size and it already takes more than an hour to transfer ca. 30% of the backup.

This is as slow as it was with USB 2.0 on my iPhone 14 Pro.

I am using the latest software on all devices and use a direct connection from my 14" MBP to the iPhone with the original Apple Thunderbold 3 Pro cable.

This process should not take more than half an hour even if you add a significant slack.

 

[LiemTa]

Thunderbolt is not the same as USB 3.0. USB-C also has nothing to do with USB 3.0. USB-C is only a shape.

From Apple‘s website:

• USB-C connector with support for:
• Charging
• DisplayPort
• USB 3 (up to 10Gb/s)16

 

[appltech]

The iPhone 15 Pro comes with support for USB 3.2 Gen 2, theoretically supports data transfer speeds up to 10Gbps
compared to USB 2.0 on the iPhone 15, which caps out at 480Mbps
My opinion speed would differ depending on what kind of data are you transferring

Hmm, maybe restarting both devices (sorry for the stupid advice) could be helpful?

 

[phillytim]

Would anyone have compatible cable recommendations?

 

[Brookzy]

The official Apple Thunderbolt 4 (USB‑C) Pro Cable, in any length, should be backwards compatible with USB 3.2.

This is fairly unique amongst longer Thunderbolt cables, but that is the official spec according to Apple.

So in theory it shouldn't be the cable choice that is the issue here, unless of course it is a defective cable.

 

[autofree]

I'm going through the exact same issue as we speak. I backed up my 13 PM with 500GB of data on it, which took over 2+ hours to backup. Now I'm restoring it using a certified TP4/USBC3 cable, but the restore speed is the same as USB 2. It's painfully slow. This cable has been working fine when I was backing up my Mac to an external USB 3 SSD drive. I'm using my MBP 16.

This was not the speed that I had hoped for.

 

[MacCheetah3]

There’s more than just the connection speed that affects data transfers. Nonetheless, what does the system report show for iPhone (USB) speed? Is it 10Gbps?

For example:

 

[autofree]

Report from Mac system info shows "Up to 10Gb/s". So it's USB3. But transfer speed was still over 2 hours. Mines finally competed.

 

[maratus]

Well, the backup restoration is not really the same as file transfer due to various processing overheads. Offloading large video files would be a much more relevant test.

 

[JPack]

I wonder if the iPhone is simply throttling due to heat.

 

[LiemTa]

Well, the backup restoration is not really the same as file transfer due to various processing overheads. Offloading large video files would be a much more relevant test.

This. If it were the case otherwise, installing apps would take milliseconds to seconds.