Gigabyte
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The gigabyte is a multiple of the unit byte for digital information. The prefix giga means 109 in the International System of Units (SI). Therefore, one gigabyte is one billion bytes. The unit symbol for the gigabyte is GB.
This 2.5 inch hard drive has a capacity of 500 gigabytes (GB) of data (i.e., 500 billion bytes).
Western Digital
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Western Digital Corporation is an American computer drive manufacturer and data storage company, headquartered in San Jose, California. It designs, manufactures and sells data technology products, including data storage devices, data center systems and cloud storage services.
Headquarters in the Santa Teresa district of San Jose, California in 2021
WD33C93 single-chip SCSI interface
Western Digital Tidbit 60 (WDAH260) - 62.3 MB (2.5 inch drive mounted in 3.5 inch adapter bracket)
Western Digital Caviar 80 MB (model number WDAC280-32), from a series of HDDs for desktop PCs; it is a 3.5-inch HDD mounted onto a 5.25-inch adapter bracket.