This is along the lines of "What are the minimal system requirements to run a full node (iri)?", but I'm specifically asking about disk space.
The current Bitcoin blockchain data is around 170 GB in size. The Ethereum state data is around 110 GB (though varies depending on which client you're using, and which download/pruning mode).
The answers to the below questions are perhaps moving targets, but it'd be good to get a ball park idea.
- What is the current size of the IOTA chain data (the tangle)?
- What is the expected rate of growth, given current rates of adoption?
- Are there any pruning or compression options I can use to reduce my disk footprint?
If I'm going to require a couple of 1TB drives in a few months, then it'd be useful to know about it now, rather than having to upgrade later.