DeleteFilesWithASpecificExtensionFromAGivenSubfolderInADLS.ps1

[lkatepaga]

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############# Script Overview #################################################################
##########The below PowerShell script helps delete files with a specific extension from a given subfolder path
######in an Azure Data Lake Storage Gen2 container (hierarchical namespace enabled).
######It recursively scans the specified directory and removes matching files while skipping folders.######

Input Parameters

$storageAccountName = ""
$storageAccountKey = ""
$containerName = "" # Also called the file system name
$subfolderPath = "<Your/Subfolder/Path>" # Example: "logs/2025/may"
$fileExtension = ".txt" # Extension of files to delete

Authenticate with storage account

$context = New-AzStorageContext -StorageAccountName $storageAccountName -StorageAccountKey $storageAccountKey

Get list of items in the specified subfolder path

$items = Get-AzDataLakeGen2ChildItem -Context $context -FileSystem $containerName -Path $subfolderPath -Recurse

foreach ($item in $items) {
if (-not $item.IsDirectory -and $item.Name.EndsWith($fileExtension)) {
$blobPath = $item.Path
Remove-AzDataLakeGen2Item -Context $context -FileSystem $containerName -Path $blobPath -Force
Write-Output "Deleted: $blobPath"
}
}