System.IO.PathTooLongException reference

I have taken out the related code from the app and put it together as following:

try
{
    StorageFolder sf = await ApplicationData.Current.LocalFolder.CreateFolderAsync("Temp", CreationCollisionOption.ReplaceExisting);
    await sfFile.CopyAsync(sf);
}
catch(Exception ex)
{
}

where sfFile has the following:

Path = "E:\\Temp\\aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaasdfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffdddfffffffffffffffffffdddddddddddddddddddddddddddddddddddddddddd.png"

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Hong