45,000 products on site that need to be assigned to 5 different shipping profiles based upon sku. Is there a way to do this via csv or any other method other than 50 at a time on the shipping profile page itself? one of these profiles is getting 21000 products linked to it and there is no reasonable way to do that 50 at a time.
Hi @Pelham 
you could create an automation using the mechanic app e.g. https://tasks.mechanic.dev/?q=profile
Or even in shopify-flow using the admin-api action etc
If you need type of automation for your business then contact me for services.
Contact info in forum signature below 
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ALWAYS please provide context, examples: store url, theme name, post url(s) , or any further detail in ALL correspondence.