Remove all characters after file extension

I am using the Broadcatching feature on a Zyxel NSA325.

Some podcast feeds (rss) work fine, however others come down with additional characters after the file extension

e.g.

nisbeginner2_tailandia.mp3_d13a76d516d9dec20c3d276ce028ed5089ab1ce3dae902ea1d01cf8135d3ca589e15&c_id=1868712

I'd like to remove all characters after the file extension .mp3

Matt

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Reply to #1:
Are you sure the files work? The extra characters is sometimes a result of the file not being finished downloading. But if you want to remove the extra characters, try to do like this:

Add the Remove Pattern method and configure it like this:
Pattern: _.*
Use regular expressions: Checked
Apply to: Externsion

I hope this works for you.

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