Finally after days & hours of trying to find a workaround regarding not being able to access my music library on my phone & tablet.
Thanks to someone mentioning the App called HiFi Cast. Sorry did not get his name. But thanks heaps. Best answer!
Downloaded the app. Opened the app & it showed my music library on my device.
I then found some options by pressing the row of lines on the top left corner that showed one of them being my Sonos Play 5 which I pressed. Then I pressed the album I wanted to play & guess what. It works!
I found this the most easiest & least time consuming than the other options of uploading music to clouds, Youtube music, Spotify etc. Trying to workout what a NAS drive is etc, etc I even figured out I could also plug in a bluetooth receiver into the 3.5 jack at the back of the speaker. But mine was a very cheap one which played the music but voice/singing was far too quiet. So I ordered a HiFi bluetooth receiver......... But looks like I may not need it now.
All I wanted was the original functionality of going to my device & choosing my personal music that I have saved to an SD card or in my phone & tablet.
The only thing is you cannot put your phone to sleep as the music will stop. Something you can adjust in your device settings.
The other thing is I had my Sonos playing radio station music before I installed the HiFi Cast app. Once I chose my song the radio station music stopped & my song came on. Awesome! Not sure as yet if I need to ever open the Sonos app to play my music. Maybe just to access the speaker settings?
Not sure why Sonos didn't give us this option before & now.