The service offers a Gigabyte for eligible citizens, which isn't a lot. Until you multiply it by India's 1.4 billion citizens and get to a potential for 14 Exabytes if the system ever fills up. Of course not all will be able to, or choose to, use the service, but there's still potential for this to become a truly ginormous storage rig.
DigiLocker may be a little scary, as registration requires one to use one's â€œAadhaar Numberâ€, the 12 digit identification number the government uses to identify Indian citizens. It's intended that citizens will use Digital Locker to store correspondence with government. The government, in turn, will digitally sign documents in the lockers to ensure their authenticity.