How to Search a File on Your Computer

To find a file with the “.csv” extension that was last modified a year ago on the D drive using PowerShell, you can modify the -Filter parameter of the Get-ChildItem cmdlet to search for files with the “.csv” extension.

$yearAgo = (Get-Date).AddYears(-1)

Get-ChildItem -Path "D:\" -Filter "*.csv" -Recurse | Where-Object {

  $_.LastWriteTime -lt $yearAgo

}

This script uses the -Filter parameter to search for files with the “.csv” extension on the D drive, using the * wildcard to match any characters before the extension. The output of the Get-ChildItem cmdlet is then piped to the Where-Object cmdlet, which filters the results based on the last write time of the file using the LastWriteTime property. It returns only the files that were last modified before the date a year ago.

To save the result to a variable, you can use the $ symbol followed by a name for the variable. For example:

$yearAgo = (Get-Date).AddYears(-1)
$results = Get-ChildItem -Path "D:\" -Filter "*.csv" -Recurse | Where-Object {

  $_.LastWriteTime -lt $yearAgo

}

This script saves the result of the Get-ChildItem and Where-Object cmdlets to the $results variable.

To export the results to a CSV file, you can use the Export-Csv cmdlet. For example:

$yearAgo = (Get-Date).AddYears(-1)

$results = Get-ChildItem -Path "D:\" -Filter "*.csv" -Recurse | Where-Object {

  $_.LastWriteTime -lt $yearAgo

}

$results | Export-Csv -Path "C:\Temp\Results.csv" -NoTypeInformation