How to use the electron affinity graph
You can use electron affinity charts to determine how fast your device can transfer data.
Electron affinity charts are not a foolproof way to figure out what speed your device will be able to transfer data at.
You need to measure the speed of your data transfer before you can make any decisions about how fast you want your device to be able transfer data (which is why it’s often a good idea to do it before you purchase your device, because it may make it harder to determine what your speed will be when you buy it).
For example, a device that can transfer 5 MBps (5 MB/s) is able to send 10 MBps of data in one second.
A device that is able only to transfer 1 MBps at the moment is able’t do that for a while.
If you want to know how fast an app will be transferring data in a short period of time, you can use the app’s device speed, or the number of seconds that your device has been running.
This is not the same as using a speedtest app to test your device.
For more on speed tests, see What speed test app do I need?
and Which app should I use?