How to enable btrfs compression on a disk?

The btrfs compression can significantly reduce the actual disk usage.

Prerequisite

Create the btrfs filesystem on the disk (assuming the target disk is /dev/sdd)
```
sudo mkfs.btrfs /dev/sdd
```
Mount the disk
```
#mkdir $dst_dirpath
mkdir snowcat-storage/
mount -o compress=zstd:4 /dev/sdd snowcat-storage/
```
Note: zstd:4 means we use level=4 compression. There are in total 10 levels to choose, through which you can trade-off between the speed and disk usage.
Use the disk!