How many megabytes can a 63 minute CD hold?

the amount of information a CD can hold is measured in minutes:seconds:sectors. Each second contains 75 sectors, each of which can hold 2048 bytes (2 kilobytes) of Mode 1 user data. 63 min x (60 sec) x (75 sectors) x (2 kbytes) = 567,000 kilobytes = 553 megabytes The CD can hold about 553 megabytes of data for 63 minutes.