WHY IS THAT THE ACTUAL STORAGE CAPACITY OF THE PRODUCT SLIGHTLY LESS THAN IT WRITTEN ON THE PRODUCT SPECIFICATION?

• All storage product will display a lower than stated memory capacity when they are viewed on a computer.

• The reason for this discrepancy is the way in which Flash memory and hard drive manufacturers calculate a megabyte of memory.

• Windows calculates a Megabyte as 1,000KBs, when in fact the correct calculation is 1,024KBs.

• So, for a 512MB storage device, Windows will calculate it as having a capacity of

512 MB = 512 * 1MB = 512*1000 KB = 512 * 1000 * 1000 Bytes.

512,000,000 Bytes ÷ 1,024 = 5,00,000 KB

5,00,000 KB ÷ 1,024 = 488.28 MB

• In addition it has a memory capacity overhead of between 1 – 3% to allow for:
  (1). Firmware
  (2). Software applications
  (3). Enhanced data storage reliability.

• So, when every thing is taken into consideration, your product displaying a lower than specified memory capacity is in fact normal.

Source: Transcend.