Sep 11, 2017

Resize the persistent disk in the Google Cloud Platform Console:

Go to the VM instances page.
GO TO THE VM INSTANCES PAGE
Click the name of the root disk that you want to resize.
At the top of the disk details page, click Edit.
In the Size field, enter the new size for your disk.
At the bottom of the disk details page, click Save to apply your changes to the disk.
After you resize the disk, you must repartition the root persistent disk so that the operating system can access the additional space. Some operating systems support automatic root disk resizing, so you can simply restart the instance.