When net neutrality was the law you could do that and the phone company couldn't charge you. The company branded phone could just not support it. Before that it was ridiculously expensive, and now it depends on the company. Most post paid plans take it out of your fast data with no extra fee.
Hamr drives and for data center use. Consumer ssds are made very poorly and even premium drives like a Samsung pro won't hold up in a data center environment. Hard drives on the other hand are basically only data center versions now.