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During file copy tasks from the main hard drive of my computer to an external hard drive, the copy process will suddenly drop to zero and never pick up again. This happens consistently on any largish file transfer process.

As far as I can tell, the external drive is dropping out as if it has been removed, however windows does not register its absence. The only way to reset the drive is to pull the cable from the hub and reconnect it. This is not a problem with the drive, as the issue does not arise when the drive is connected directly to the computer.

I have no way to measure the power output of the USB ports on the hub, however the power supply for the hub is rated at 5 volts, 2.0 amps, which is way above the anemic 0.5 amps of the laptop it is connected to. As a check, I changed the power management on the USB ports to ensure Windows wasn't forcing the drive into low power mode.

System Details:

Any hints what the problem is, or what a solution might be?

codingCat
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