What is consuming disk space?

Short answer Find the full volume, then measure accessible folders to identify the largest consumer.

When to use it

When a workstation or server is unexpectedly low on disk space.

Volume usage

Get-Volume | Where-Object DriveLetter | Select-Object DriveLetter,FileSystemLabel,@{N="SizeGB";E={[math]::Round($_.Size/1GB,1)}},@{N="FreeGB";E={[math]::Round($_.SizeRemaining/1GB,1)}}

Note

Identify the critical volume first.

Folder size

$Path='C:\ExampleFolder'
$Size=(Get-ChildItem $Path -File -Recurse -Force -ErrorAction SilentlyContinue|Measure-Object Length -Sum).Sum
'{0:N2} GB' -f ($Size/1GB)

Note

Large trees can take time.

Caution

Never manually delete files from WinSxS, Installer or protected system folders.