Transcoding temp folder

I am wondering if other folders then the transcoding temp folder is being used when transcoding. The reason I ask is that I have a lot of data written to my C-drive (windows drive) whenever I use Serviio transcoding feature even though I have set it to use drive I (i, another drive). I can see amount of data written as SMART registers record this on a SSD drive.

So, does Serviio use the windows drive (C:) as well as the configured transcoding folder?

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No it should not. Do you see the transcoding files being created on the I drive?

I do see files being put on drive I.

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Is this when you watch on MediaBrowser on using DLNA? I think the web Flash player caches the files as well somewhere.