Instructions on https://pureos.net/download/ fail for some users, due to a recent rebranding of Etcher and/or the usage of AppImage as a delivery mechanism on GNU/Linux.
Current instructions:
Creating an Install Drive * Download Etcher for your current operating system. * Open Etcher. * Select the PureOS ISO file you downloaded. * Select the USB drive you want to turn into an install drive. * Click "Flash!" * The USB drive is now an install drive! * Follow the [installation steps](https://tracker.pureos.net/w/installation_guide/live_system_installation/) to install PureOS
Suggested update:
Creating an Install Drive * [Download and Install Etcher](https://www.balena.io/etcher/) for your current operating system. * If you run into difficulties, try these [alternate instructions](https://github.com/balena-io/etcher). * Open Etcher. * Select the PureOS ISO file you downloaded. * Select the USB drive you want to turn into an install drive. * Click "Flash!" * The USB drive is now an install drive! * Follow the [installation steps](https://tracker.pureos.net/w/installation_guide/live_system_installation/) to install PureOS
Small screenshots might be worthwhile here as well.