Only keep thumbnail and erase original image ?

[cakissimo]

Hello,


I have a xthread field type image, i use

"Image Thumbnail Generation"
350x350

"Display Format"
<img src="{URL}/thumb350x350" alt="{FILENAME}" title="{FILENAME}" style="margin: 3px; " />

I'm using a lot of thumbnails but never the original file. To save space, I'd like to prevent the original from being saved on disk but only keep a thumbnail of 350px.

A way to this automatically without intervening manually ?