@uu8k Playing a sound file from a shared folder is fairly straightforward. Please check out this post: Editing "basic sampler" to be more than 2 seconds
Also, instead of using the sound file we provided, you can copy your own sound file to the Children of Sample patch folder on the USB drive. You can also have multiple versions of the patch, each with its own sound file (Children of Sample - Drums, Children of Sample - Cello, Children of Sample - Recordings I Made in College)