Automatic full directory scan?

Can I change the value for directory scan.
I am testing using my android phone for image uploading.
But I want to change the time between automatic directory scan.
Now I think it is 24 hrs?
Is that possibly?

www.billesbilder.se


style="display:inline-block;width:468px;height:60px"
data-ad-client="ca-pub-8698264690166658"
data-ad-slot="4417389723">