If you don’t have any items eligible, just turn the rate off.
Settings->Shipping and Delivery
Click on the shipping profile to edit. If you’ve not set up multiple profiles, you’ll have a General profile. Click it.
Under Shipping zones, you’ll have a Domestic option.
Assuming you’re using calculated USPS rates, you just need to go into the rates and deselect the Media Mail option. There should be checkboxes for each option you want to make available.
We’re unable to determine when the Media Mail shipping method was enabled on your store, as we don’t have access to merchant accounts over the Shopify Community. However, the Media Mail shipping method has been available for awhile now. That being said, you can manage the calculated shipping methods and disable Media Mail. If you need help with this, then we’d recommend taking a look at our guide: Create calculated shipping rates.
If the problem continues to persist or you require further assistance with disabling Media Mail, then we’d be happy to assist you through live chats. Simply visit the Shopify Help Center and login to your account to create a support request.
I had the same issues. I actually went into my Shopify account on my phone and was able to uncheck the Media Mail option. Go into Settings>Shipping. Then click “General Shipping Rates”. Scroll down to “Shipping Zones” and underneath it, you’ll see USPS. Click the 3 dots on the right side and select “Edit Rate”. You can now deselect Media Mail.
Hey there im currently having this issue and I went to the settings and toggled it off on USPS settings and its still giving the option at check out. is there some sort of glitch happening? because its becoming an issue because the actual shipping costs doesnt cost the same and we are having to cover the difference. ive been on the help chat several times and havent been able to successfully figure out this problem.