If you have a .siakey file to load, the method is going either to the Terminal and typing the command "siac wallet load siag
Sia is a competitive marketplace, so you decide your own pricing, but of course you will want to stay competitive to get more file contracts for your host. The Sia client of renters will assign you an score according to many factors, including your pricing (also the age of your host or how much remaining storage you have) and will pick up only the best scored hosts.
As a suggestion, you can check this table "Top 100 hosts average settings" to get an idea of what competitive hosts are doing: https://www.siastats.info/hosts_network.html . To answer your question, they are asking right now for 50SC/TB/month on average
less than USD$4.00 a month for 1TB ? Why would anyone do this ?
Are you seriously asking that? I don't know... maybe because you can ROI 4TB disks in 5-6 months? The payout is right now very high in FIAT because after the recent pump in coin price the hosts are still adjusting the prices. Most probably the prices will stabilize in $2/TB or bellow. Still profitable: ROI in about 2 years looks bad, but NAS-grade disks are prepared to last 5 or more years and unlike mining in hosting there is no difficulty factor reducing your gains over time. So it can be a niche business. This, of course, if you fill your disks, because right now usage of the network is still growing.
Not interesting at all, not sure why anyone would think otherwise. You need a computer running 24/24 + bandwidth + electricity + time configuring it + maintenance (tons of reasons why yo need to look after it).
I wouldnt do it for twice that price.