No "USB Computer connection" under settings/storage.

Hi all,

New to the site and hoping to find a solution to a problem I'm having.
First off, I'm not tech savvy at all, so I might be missing something very basic here.

I'm trying to connect my galaxy J7 to my PC to transfer mp3 files. My PC is not picking up my phone at all. I've tried switching cables. Suffice to say, it didn't work.

I searched the internet for a solution and many sites recommend enabling "Media device (MTP)" under settings/storage.
However when I go to...

No "USB Computer connection" under settings/storage.

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