Other Why are Lightning to USB-C Computer Backups so Slow

[UPBaylor]

Since Lightning cables should be able to transfer at slightly under 0.5 GB/sec, why does the backup to my 2020 MacBook Pro (with upgraded processor and RAM) take 20 minutes or so? I'm only using about 25 GB of data on the phone, so it's not like there is a massive amount to transfer. FWIW, my current phone is an 8. This is not a new finding, it's always been this way. I thought that when I got my new MBP last year, I thought I would notice a big speed improvement, but it's about the same as on my older MBP.

Does anyone know if there is a throttle point or something else?

 

[Mbman81]

I think the data portion of lightening is limited to old usb-2.0 speed.

 

[maerz001]

lightning is up to iphone 13 still usb 2 speed. About 30MB/s

so the new 1tb option will take about 10 hours to backup

 

[UPBaylor]

Thanks! I was under the wrong impression about the speeds via lightning.

 

[joevt]

Some iPad Pros have a USB 3.0 option from lightning port:
https://www.apple.com/ca/shop/product/MK0W2AM/A/lightning-to-usb-3-camera-adapter
but that's only for when the iPad Pro is the host for a USB 3.0 peripheral (specifically, a camera).

Here's a similar adapter that does the same thing (USB 3.0) for the same iPad Pros with other types of USB 3.0 peripherals (specifically, SD card reader):
https://www.apple.com/ca/shop/product/MJYT2AM/A/lightning-to-sd-card-camera-reader

Both of those adapters are one way? Maybe they can only support reading from USB 3.0 because they only have two wires to use for USB. USB uses differential singling - two wires for a signal. USB 3.0 uses two wires for reading and two wires for writing. USB 2.0 on the other hand uses two wires for both reading and writing.
That theory doesn't make sense, since the host needs to be able to tell the peripheral what to read.