Why this answer matters
USB-C describes the connector, not the negotiated data rate. This distinction is one of the main reasons a healthy iPhone 16 Pro can appear 'slow' with an unsuitable cable or hub.
Requirements
What has to be true
- USB 3-capable USB-C cable for faster data.
- USB 3-capable host port and destination storage.
Verify it yourself
Use this test sequence
Change one variable at a time so you know which requirement made the difference.
- 1
Confirm the model is iPhone 16 Pro rather than iPhone 16.
- 2
Remove hubs and test direct to a known USB 3 host.
- 3
Use a known high-speed cable and local SSD before judging the phone.
Limits
What this answer does not prove
- 10 Gb/s is the maximum signaling class, not guaranteed file-copy throughput.
- Charging and DisplayPort can work through paths that do not provide 10-Gb/s data.
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