If you don't wish to run a full archival node, you can choose to run a light-weight consensus node that has ~90% savings in disk space requirements. The Lite Consensus Node achieves the disk space savings by pruning the state DB and only keeping a set of the most recent Periods.
Here's how Taraxa's Lite Consensus Node stacks up against other PoS Layer-1s' consensus nodes.
Here's how you can set up a Lite Consensus Node.
1. Lite Consensus Node on the Taraxa Mainnet
1.1 Set up a Lite Consensus Node on the Mainnet from scratch