Well, it is my first time to put my eye on Sia.
A naive question:
can I earn Sia according to sharing my free storage?
If so , How much will I get profit from 1TB storage per month?
Yes, hosts are paid in Siacoins when renters make use of their storage. You decide your own pricing, but as Sia is a competitive marketplace, you'll want to keep competitive prices. You can check the current average that the top 100 hosts are asking here:
https://siastats.info/hosts_network, currently 40SC/TB/month
Take in mind that hosting is a serious commitment: you have uptime requirements and you risk an amount in Siacoins in collateral as a guarantee you'll keep the files and the uptime during the whole contract. Check more info about hosting here:
https://siasetup.info/guides/hosting_on_sia40sc/tb/month don't seem a good profit given the present price. 40sc ~0.8 $ which cannot afford for the electric fee.