Hello Winter,
Thank you for being with us and for your appreciation.
It's not possible to select all files in a single tap. However, we will take this as a feedback and escalated it to our development team for further review.
Thank you for your support in improving our products and for sharing this with us.
I am using this product on my phone to wake me up every morning, i really like it.
My favorite feature is the "Wake From Random Song by Playlist" stuff, but… i have thousands of songs on my phone and selecting them one by one is really inconvenient. Is there any way to select all files with one tap? If not, can you guys make an option to do this?
Also like to see an option to specify a folder for my wake up musics.
Thank you guys and keep up the good work! 
Hello Winter,
Thank you for being with us and for your appreciation.
It's not possible to select all files in a single tap. However, we will take this as a feedback and escalated it to our development team for further review.
Thank you for your support in improving our products and for sharing this with us.