It's about 1.x GB and increasing.
Thanks! But wasn't it said to be "without" blockchain? (sorry iam no coder, only use byteball and try it out) If there is data to process and store, what is is the advantage to bitcoin/ethereum/monero and stuff? I only want to understand it (before probably investing more)
It is a database, but not a blockchain database, as LevelDB in bitcoin. In fact, this implementation stores the dag in a SQL database.
Each wallet does not have to store the full dag, you can select to run a light wallet, in that case it wont use basically any storage aside from your keys and private assets.
The advantage is all the features listed on byteball.org and being a DAG it has no architectural limit on scaling, only implementation and hardware is limiting.