Sickrage - Rapsberry Pi - Not enough disk space

Hi,

I have SickRage installed on my raspberry pi.
But now it isn’t starting anymore and I get the message.
“Looks like we don’t have enough disk space to render the page”.

SickRage is taking up 28 gig? Is this normal? Or I have I a wrong set up?
I have an external hard disk connected to the raspberry pi.
This is were the files are downloaded to.

what version of SR ?