Actual Storage calculates the actual storage capacity of secondary storage mediums, such as hard drives, CDs/DVDs, and USB drives. It can handle units from KB (1000 bytes in the decimal system) to YB (1000^8 bytes in the decimal system).
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.