Lenovo ThinkPad C14 Gen 1 Chromebook 21C9 User Manual page 9

Statement on USB transfer rate
Depending on many factors such as the processing capability of the host and peripheral devices, file
attributes, and other factors related to system configuration and operating environments, the actual transfer
rate using the various USB connectors on this device will vary and will be slower than the data rate listed
below for each corresponding device.
USB device
3.2 Gen 1 / 3.1 Gen 1
3.2 Gen 2 / 3.1 Gen 2
3.2 Gen 2 × 2
4 Gen 2 × 2
4 Gen 3 × 2
Thunderbolt 3
Thunderbolt 4
Data rate (Gbit/s)
5
10
20
20
40
40
40
.
Chapter 1 Meet your Chromebook
5