A PowerShell module to backup your Steam screenshot folders.
PS C:\> Install-Module Backup-SteamScreenshots
PS C:\> Import-Module Backup-SteamScreenshots
PS C:\> Backup-SteamScreenshots -DestinationPath C:\Your\Backup\Path
With Write-Information enabled:
PS C:\> Backup-SteamScreenshots -DestinationPath C:\Your\Backup\Path -InformationAction Continue
Write-Information enabled