I installed algorand with these commands:
git clone https://github.com/algorand/go-algorand
Then, in order to use the testnet network, I started the node in this way:
cp installer/genesis/testnet/genesis.json ~/.algorand-testnet/genesis.json
goal node start -d ~/.algorand-testnet
My questions are : Is my node a non-relay node? Does it store the entire ledger on disk? How much disk space does it need?