It says that a minimum of 100TiB will be required for mainnet. Wow! And I will want redundancy. How does one store 200 TiB? Links?
At mainnet, a minimum of 100 TB in Storage Power will be required to enter the network’s Power Table from which miners can be elected for Block rewards.
There are other types of mining to earn FIL however, including Storage mining which will only require a minimum of 1 TB. Retrieval mining and Repair mining will also evolve more in the future and be additional ways to earn FIL.
To get started with mining, see the Filecoin Lotus Docs to set up a node and miner.