Can't copy large files from 1020 to PC

[ListenUpGuys]

Little JPEGs copy OK, but anything more than a few MB either gives an error "a device attached to the system is not functioning" or Windows Explorer hangs (badly). Has anyone experienced this before?

Selecting all files in the Pictures folder also causes both errors. It's a fresh install of Windows 7 with all the recommended updates.

 

[ListenUpGuys]

Changing the USB port fixed it. I was using a USB 3.0 internal hub previously, and I'm now using a USB 2.0 port. Interesting...