No chipset drivers for my board on the Intel site just server. Have downloaded the Driver support Assistant and will give that a go when I am booted into Windows.

Well no problems in Linux and comparing files seems to work ok. Windows is getting worse. It's since the May update.

In reply to a post by Banger:

Well no problems in Linux and comparing files seems to work ok. Windows is getting worse. It's since the May update.

This will be down to the motherboard chipset drivers. What chipset does your motherboard use?

Linux updates this stuff automatically, Microsoft doesn't automatically update, so you need to get the updates from your motherboard manufacturer.

You may have an Intel CPU but you could have a third party (NVidia, AMD etc) chipset. The chipset controlls all the Input Output including USB.

Its an Intel H310M. It was working fine last week before the May Patch Tuesday. I have downloaded the Driver Assistant from Intel says everything up to date. I have installed the latest INF files so will test next week. All the Teracopy Verify hashes are failing in Windows but not Linux.

In reply to a post by Banger:

Its an Intel H310M. It was working fine last week before the May Patch Tuesday. I have downloaded the Driver Assistant from Intel says everything up to date. I have installed the latest INF files so will test next week. All the Teracopy Verify hashes are failing in Windows but not Linux.

Something sounds up then... if you've ever had any third party security software (e.g. Norton demo) then look for a full uninstaller from the company. You could just be unlucky with the combination.

An external powered hub, as in some monitors, might also help.

Yes the Dock is connected to a TP-Link powered hub. Been doing backups for ages and copying them to adjoining disks but all of a sudden stopped working with various error codes. No Norton or anything like that has been installed.

Disappearing USB devices is not that common, but I think you've worked through the normal options, and you've ruled out hardware (cables, connectors) by booting into Linux. I don't have any other ideas. I don't generally keep USB devices connected long term like this; I use network connections for external drives.

Interesting note from the latest Windows Cumulative Preview Update.

The USB3 stack is updated to have additional resiliency and recovery measures in place against certain unexpected hardware faults and conditions. Users will experience higher reliability with USB devices.

This is in the gradual rollout so no idea when it will hit but I wonder if it will solve my problem with USB3 file copying.

Find out next week.

Fingers crossed!

Then its windows or drivers.

You could try a windows "on the go" install to a usb drive