#Load WinSCP .NET assembly
Add-Type -Path "C:\local path\WinSCPnet.dll"
 
# Set up session options
$sessionOptions = New-Object WinSCP.SessionOptions -Property @{
    Protocol = [WinSCP.Protocol]::Sftp
    HostName = "host or IP address"
    UserName = "username"
    Password = "password"
    SshHostKeyFingerprint = ""
}
 
$session = New-Object WinSCP.Session
 
try
{
    # Connect
    $session.Open($sessionOptions)
 
    # Transfer files
    $session.PutFiles("C:\\localFile.csv", "/remote directory/*").Check()
}
finally
{
    $session.Dispose()
}