Hello @pentapower,
Welcome back!
There is no maximum size limit. The usage depends on the customers, not on the hardware or software settings. There is a virtual limit - when the amount of the uploaded data become almost equal the amount of the deleted data, I do not know what’s current equilibrium point, but my nodes on 9.28TB are full.
However, if your node loses races more often - it likely would be less used.
You may check the success rate for your node:
Please also make sure that your stat on the dashboard is matches usage on the disk.
See Disk usage discrepancy? and Avg disk space used dropped with 60-70% for possible issues.