Mark was wondering if SSDs suffer from the same storage sized calculus as traditional magnetic hard drives. Short answer is yes. The chief reason is of course is that most hard drive manufacturers typically list storage sized based on powers of 10 or a decimal system. Hard Drives and SSDs, however, being binary storage devices store their sizes in powers of 2 (for the "1" and "0"). Therefore a kilobyte might be "1000" bytes in decimal notation but in binary it actually comes out to "1024" bytes. This is where some of the storage "loss" comes from but formatting a drive also takes up space since a file system needs to be written down before a drive can be used.