there's an android upload/download client
for this if you want. it puts party up in
the share menu when you long press a file
so you can just long press and put files
right in here after you put the address
into partyup. 

you can directly install the .apk from 
here or you can install it through f-droid
to get automatic updates

https://f-droid.org/en/

https://f-droid.org/packages/me.ocv.partyup/
