An Ethereum node is a computer that runs the Ethereum protocol and helps to maintain the Ethereum network. A node can be a full node, which stores the entire blockchain and helps to validate transactions, or it can be a light node, which only stores a small portion of the blockchain.
The size of a full Ethereum node depends on how much data is stored in the blockchain. As of early 2020, the blockchain is about 200 GB in size.
This means that a full node needs to have at least 200 GB of storage space available.
However, the size of the blockchain is constantly increasing as new blocks are added. This means that a full node will need more and more storage space over time.
For this reason, it is recommended that those who want to run a full node have at least 1 TB of storage space available.
A full Ethereum node also needs to have a good internet connection. This is because the node needs to be constantly downloading new blocks as they are added to the blockchain.
A slow internet connection will make it difficult for a node to keep up with the rest of the network.
Running a full Ethereum node is not for everyone. It requires a significant amount of storage space and bandwidth.
However, for those who want to help maintain the Ethereum network, it is an important task.