The size of the DAG file is increased by 8 Mb every 30,000 blocks.
A calculator, such this https://goo.gl/L19swi , can help calculate the size of the future file, and with its help you can estimate the date when the next "change of the era" takes place.
Read how to earn money using LibreBank tokens (LBRS).
Read about LibreCash stablecoin.
Buy LibreBank tokens.
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