DigitalOcean does not provide a way to download a snapshot of your droplet locally. You can use rsync to accomplish this instead.
On your local machine, assuming you have added your-server in your SSH config:
rsync -aAXHv --append-verify --exclude={"/dev/*","/proc/*","/sys/*","/tmp/*","/run/*","/mnt/*","/media/*","/lost+found"} your-server:/
-a: archive mode (all files, with permissions, etc.)-A: preserve ACLs/permissions (not included with -a)