Google Cloud How to reduce disk size?

I have an SDD disk of 200GB in Google Cloud, that I want to reduce to 50GB. Google Cloud Console, and per documentation, only allows me to increase disk size.

What solutions do I have to decrease disk size?

How do I check disk usage in GCP?

In the Google Cloud console, go to the Cloud Monitoring > Metrics Explorer page. In the Resource and metric section, click Select a metric , then select VM Instance ( gce_instance ). Select the Instance active metric category list, and then select Disk read operations ( instance/disk/read_ops_count ). Click Apply.

What is persistent disk in Google cloud?

Persistent disks are durable network storage devices that your instances can access like physical disks in a desktop or a server. The data on each persistent disk is distributed across several physical disks.

Only increasing disk size is supported. Disks can be resized regardless of whether they are attached.

Read the following blog post for a solution to your problem. Google Compute Engine: Reducing the Size of a Persistent Disk