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I tried to transfer a 15 Gb video first from my iPhone 15 PM to PC using iTunes and 3uTools.

It transferred to my PC at roughly 100 MBps or (800 Mbps)

Then the same file I tried to copy back to VLC folder on iPhone using above 2 programs and it was same 100 MBps speed.

I am using a USB4 cable which does around 2000 MBps (16 Gbps) when using Yottamaster Nvme enclosure which is USB 3.2 Gen 2x2 (20 Gbps)

I tried switching from my PC’s USB 3.2 Gen 2 (10Gbps) port but still it was 100 MBps to and from iPhone. Then I also used my PC’s thunderbolt port and got same result.

I am on latest 17.1.1 iOS version of my phone.

What am I missing? Why are the transfer speeds so low? Internal storage benchmarks at 1500 MBps in antutu benchmark and iPhone 15 PM has port speed of 10 Gbps.

I haven’t seen a single youtube influencer test real world performance.

So what gives? Why is the transfer speed restricted to almost 10th of it’s rated speed?

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