Currently as per the bitcore site the requirements to run a full node is
around 8GB of memory and about 200GB of disk space available to store the Bitcoin blockchain plus additional database information.
As per my recent experience, the current blockchain requires atleast 240 GB disk space! It took me multiple attempts (as i had approx 210 GB disk space) to figure out that I needed more space for the blockchain. I hope this can help other who are going to run full node. Keep atleast 250-300 GB free disk space to run a full node