SAMSUNG 840 Pro Series MZ-7PD512BW 2.5" 512GB SATA III (SSD) Seagate Barracuda ST3000DM001 3TB Cache SATA Internal Hard Drive. Richard T:Why Your Hard Drive Shows Less Space Than Advertised If you’ve paid attention to hard drives, USB flash drives, and other storage devices, you may have noticed that they always have less space than promised once they’re formatted.
The reason for this difference lies in the way hard drive manufacturers advertise their devices, versus the way Windows computers actually use the storage devices. There’s also some overhead required when Windows formats your drive, for the file system and boot data, though in comparison to today’s large hard drives, it’s not a lot.
To a hard disk manufacturer, one KB is 1000 bytes, one MB is 1000 KB, and one GB is 1000 MB. Essentially, if a hard disk is advertised as 500GB, it contains 500 * 1000 * 1000 * 1000 = 500,000,000,000 bytes of space. The hard disk manufacturer thus advertises the disk as a 500 GB hard disk. Voltaic Fuse 10W Solar Laptop Charger. Otterbox SAM4-N7000-20 Samsung Galaxy Note Commuter. Seagate Barracuda 7200.12 1 TB 7200RPM SATA 6Gb/s with NCQ 32MB Cache 3.5 Inch Internal Bare Drive ST31000524AS: Electronics. Dr Martens CASE BLACK HARVEST.