Play Music (KitKat): update library not working I use BitTorrent Sync to transfer audio files to my Nexus 5. All files are transfered to the 'music' directory. When new files are added to this directory, the only way to update Play Music's library is rebooting android. There is an update button in Play Music ("Vernieuwen" in dutch) but this does not add the new files. To be honest I expected Play Music to automatically add the new files.

What can be the cause of this problem? And is there a way to solve it?

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One of the advantages of a physical SD card: unmounting and re-mounting it triggers the media scanner. But that's unlikely to be an option for you. 1

Depending on your Android version, there are different apps available on Google Play to help you out. The "version difference": starting with Kitkat, the old mechanism of triggering the media scanner does no longer work, "normal apps" are denied the permission to call it. But there's at least one new app available where the dev found a "loop-hole" to give back the functionality.

Some examples for pre-Kitkat scanners can be found in the link of "footnote 1", SD Scanner is the one promising to work with Kitkat.



1 see my answer here for a more detailed explanation of the background