Get total size of all blobs in Azure Storage (with HNS enabled)

Get-AzContainerTotalSize.ps1

# For an Azure Storage account with Hierarchical Namespace enabled, 
# this script totals up all the blobs in a container and outputs the total size in GB

# Set these variables to the storage account and container you want to get the size of
$ENV:AZURE_STORAGE_ACCOUNT = "[STORAGE ACCOUNT NAME]"
$containerName = "[CONTAINER NAME]"

# housekeeping
$ENV:AZURE_STORAGE_AUTH_MODE = "login"
$nextMarker = $null
$chunkSize = 5000
$totalSize = 0

# use az cli to get a list of blobs in a container and their sizes, using the next marker to get all of the blobs
do {
  if ($null -ne $nextMarker) {
    $resultLines = az storage fs file list -f $containerName --marker $nextMarker --num-results $chunkSize --query "[?!isDirectory].{name: name, size: contentLength, marker: nextMarker}" --show-next-marker
  } else {
    $resultLines = az storage fs file list -f $containerName --num-results $chunkSize --query "[?!isDirectory].{name: name, size: contentLength, marker: nextMarker}" --show-next-marker
  }
  $resultJson = $resultLines -join '' | ConvertFrom-Json
  
  $sizes = $resultJson | ForEach-Object { $_.size }
  $totalSize += ($sizes | Measure-Object -Sum).Sum / 1073741824

  Write-Output("> In progress size: {0} GB" -f $totalSize)

  $nextMarker = $resultJson[-1].marker
} while ($null -ne $nextMarker);


Write-Output("Total size: {0} GB" -f $totalSize)