Whilst trying to restore my Android backups from Google One Android backup, the speed is around 0.04kbps to 0.17kbps.
The backup in question is around 18GB in size and at the above download speeds, takes 6 to 8 hours.
If you run a speedtest on a computer durectly connected to a computer connected to the hub with cat 5e cable what does it show, https://www.speedtest.net/
If the speedtest reports the correct speeds then it looks like the issue is either with the device or the google servers.
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Speedtest via CAT5E cable fine.
Also contacted Google one. no known issues.