Get-AzureStorageBlobCopyStateSample.ps1

# Get all BLOBs from source container and start copy operation asynchronously for all files based on $fileFilter.
Get-AzureStorageBlob -Context $sourceStorageContext -Container $sourceStorageContainer -Blob $fileFilter | 
    Start-AzureStorageBlobCopy -DestContext $destinationStorageContext -DestContainer $destinationStorageContainer

# Check copy state in destination container.
$waitTime = 5 # Initial wait time.
do {
    # Wait some time before refresh of copy state, except on first iteration.
    if ($copyState) { 
        Write-Host "Refresh in $waitTime seconds."
        # After each iteration wait some more time.
        Start-Sleep -Seconds ($waitTime++)
    }

    # Get all BLOBs in destination container and get copy state for all of them.
    $copyState = Get-AzureStorageBlob -Context $destinationStorageContext -Container $destinationStorageContainer -Blob $fileFilter | 
                    Get-AzureStorageBlobCopyState

    # Print formatted output.
    $copyState | Format-Table -Property CopyId, Status, TotalBytes, BytesCopied, @{Name = "Progress"; Expression = {$_.BytesCopied / $_.TotalBytes * 100}; FormatString = "0.00" }, CompletionTime -AutoSize
} while ($copyState.Status -contains "Pending")