"Device busy" -- try install pfsense 2.4.5 in google cloud

  • Hi everybody
    _ I am installing pfsense on google cloud with this tutorial https://blog.kylemanna.com/cloud/pfsense-on-google-cloud/
    _ After choosing all default configure (with next ... next ... next ...). When going to the installation section (after Partitioning), I get the error message "Device busy"
    _ I do not have knowledge of firewall and pfsense. Only wish to use pfsense in combination with squid to filter https.
    => Can someone give me a solution? Thank you very much