about BIG-IQ ( or DCD) sizing

Hi guys.

according to NYCRR 500 regulation, security events should be stored for at least 3 years.

one of my customer who runs banking business wonders whether big-iq(or DCD) can store ASM events for 3 years or not.

i guess it depends on the hard disk size of dcd. but i'm not sure.

how big hard disk size must be to store security events for at least 3 years?