How has this changed? What size is etherium now?
[–]taylorgerringEthereum - Taylor Gerring 1 point 3 months ago
The current size of go-ethereum's datadir for mainnet is around 3.0GB. This includes overhead of storing in LevelDB locally, however is not a perfect representation of the actual chain itself, since it includes state transitions and the like. This is further complicated that each implementation can decide how to store the data, so there will be variance across clients, especially once pruning is enabled.
Mainnet launched on July 30, 2015 which is almost 3 months ago. With some napkin math and assuming no growth (a poor assumption based on available analytics), your local disk will need about 1GB/month to act as a full archival node.