How many bytes are in 5 gigabytes?

Either 5,000,000,000 (5 billion), or 5,368,709,120, depending on whom you ask. Most software developers use the original definition of GB, which is 230 bytes, while hardware manufacturers usually advertise their size in terms of decimal gigabytes (even multiples of one billion). If you look at a file in Microsoft Windows that is 5,000,000,000 bytes, the file will only be 4.66 GB.