PSGEN2FSSizeCalculation.ps1

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  #This Script would help in calculating the size of each File system(container) in an ADLSGEN2 storage account #



  [CmdletBinding()]
Param(
  [Parameter(Mandatory=$true,Position=1)] [string] $StorageAccountName,
  #Please enter Shared Access Signature <SAS token > generated with the permissions <ss=b;srt=sco;sp=rwl>
  [Parameter(Mandatory=$True,Position=1)] [string] $SharedAccessSignature,
$totalSize ,
$continuationtoken = $null
) 

# Getting the List of Filesystem present in the storage account using REST API

$listfile= "https://$StorageAccountName.dfs.core.windows.net/$SharedAccessSignature&resource=account"
$listfileURI =  Invoke-WebRequest -Method Get -Uri $listfile
$FilesystemName = $listfileURI.Content|ConvertFrom-Json
$test1 = $FilesystemName.filesystems.name

foreach ($filesystem in $test1)
{
	do
		{
		#Retriving the properties of the all the files in the filsystem 
				$URI =  "https://$StorageAccountName.dfs.core.windows.net/"+$filesystem+"$SharedAccessSignature&recursive=true&resource=filesystem&continuation="+$continuationtoken+"&maxResults=1000”
				$webcont =  Invoke-WebRequest -Method Get -Uri $URI
				$continuationtoken =  $webcont.Headers.'x-ms-continuation'
				$json = $webcont.Content | ConvertFrom-Json
				$totalSize=0
		# Each Filesystem size calculation using REST API
				$totalSize = $totalSize  + ($json.paths.contentLength | Measure-Object -Sum).Sum
	} While ($continuationtoken -ne $null)

	  $sizeinGB = $totalSize/1GB 
	  Write-Host  "`n" "Total size of the $filesystem filesystem is | $totalSize Bytes| $sizeinGB GB" "`n"
	  Write-Host "==========================================================="
}