Can I make my Droplet smaller?

No, Droplet’s cannot be resized to a smaller plan. This is because a Droplet may contain more data on its hard disk than the new, smaller Droplet’s hard disk size would allow, and the data could not be transferred to the smaller hard disk without the risk of loss or corruption.

You can resize Droplets to larger plans or you can migrate data to smaller Droplets.

You can review disk usage on your Droplet and then remove unnecessary files.
High RAM or CPU usage is normally the result of applications or kernel processes on the Droplet. You can monitor high CPU usage processes on the Droplet and stop them if necessary.
Filesystem tools often don’t report the capacity reserved for metadata and the root user, and some report size in different units.