I am trying to access my Google Drive files from a php script that will be run in a cron job, but I can\'t see my files. I am using a Service account set up in Google Develo
I made a shared folder in my GUI accessible drive, then I insert the files from the commandline under this folder shared, so I see them ;)
Google will create its own google drive for service account.
What you need to do is SHARE your folder with service's account email from console.
Give it permission "can edit".