In some cases, we may need to identify the maximum length of full file path in a directory such that we can reduce the file name to avoid file length/security policy issues.

PS Script:-

$pathToScan = "C:\temp\File_Length"  
$outputFilePath = "C:\temp\File_Length\output.txt" 
$writeOnConsole = $true   

$outputDir = Split-Path $outputFilePath -Parent
if (!(Test-Path $outputDir)) { New-Item $outputDir -ItemType Directory }

if ($writeOnConsole) {Write-Host "*************************************"}
if ($writeOnConsole) {Write-Host "  List of files with file Length :-  "}
if ($writeOnConsole) {Write-Host "*************************************"}
$stream = New-Object System.IO.StreamWriter($outputFilePath, $false)
Get-ChildItem -Path $pathToScan -Recurse -Force | Sort-Object {($_.FullName.Length)} -Descending | ForEach-Object {
    $Path = $_.FullName
    $len = $_.FullName.Length
    $strg = "$len : $Path"
    
    if ($writeOnConsole) { Write-Host $strg }

    $stream.WriteLine($strg)
}
$stream.Close()

Output:-

Hope this would be helpful, thanks for reading !!

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