I've since discovered my main issue was lack of support for NVIDIA GeForce GTX 960M Graphics during the install process. Googling the issue I found adding nomodeset in grub after quiet splash allowed the install to proceed and not hang at the start or the end. The issue was probably a genuine corruption of the USB stick. Every time I got to the point of install completion (when this disk error did not occur) the process would hang after the "remove media" request. So I was removing the USB stick with possibly it still mounted and active. I would then try the install again. I've probably completed +20 install attempts before the last successful one using "nomodeset" and the "erase disk and install Ubuntu" option.
This bug cab be closed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1643250 Title: Installer error copying files to disk To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1643250/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs