Each of the four LHC experiments typically expect to record data from their detectors at a rate of 200 to 300 events per second (1 MB in size), which for a typical running time of 5 × 106 seconds gives 1.5 PB of data every year.
Charpentier, P. (2012). Grid computing. In LHC Physics (pp. 371–389). CRC Press. https://doi.org/10.4018/ijsem.2014070105