#!/bin/bash

[ "$1" = '' ] && fs=/ || fs=$1 # Use specific dir if provided

echo "Available block devices:"
sudo fdisk -l | grep -E '^Disk /dev'
echo
echo "Available filesystems:"
sudo blkid
echo
echo "Current disk usage:"
sudo df -Tm | grep -v tmpfs
echo
echo "Files and directories using 1000M+ on $fs:"
sudo du -xma --max-depth=4 $fs | grep -E '^[0-9]{4}' | sort -n