I am having trouble adding USPS Media Mail to my store. I have gone to Settings > Shipping and then checked "Media Mail" under United States > USPS. In my test run, the Media Mail option does not appear during my checkout. Does anyone know how to make this functional?
Also, how can I set it that this shipping option (Media Mail) only appears for certain products (in this case media items: vinyl, CDs, cassettes, etc.)?
Thank you for any assistance!
For Media mail, did you check with Shopify support? You can approach Support and quickly do a test in the USPS calculator that shows whether it is eligible for media mail or not. If there is no problem with eligibility, then this should start working.
Regarding, showing this rate for certain products, it can easily achieved using Multi Carrier Shipping label app. You can assign shipping services based product types with this app.