Now that 8.1 has file picker,can't apps like WhatsApp,hike use this features so that we can send audio(mp3) files and all the videos(both in sd and local memory)!!!???
It is possible right??because this is the one feature that will push wp beyond expectations...
Technically, it's access to the file system. The file picker has been around for a while, but it was restricted to photos only.
Now, for your concern, it depends on the developer. So, if you're really interested in this, contact Whatsapp. They'll implement this, considering their track record, if you ask me.
WhatsApp still working on their wp8 version...nothing progress going on their 8.1 version i think
There is a private beta.