Definition - What does Megabytes Per Second (MBps) mean?
Megabytes per second (MBps) is a measure used to describe data transfer rates between devices. One megabyte is technically equal to 1,048,576 bytes, but in networking it refers to 1 million bytes. MBps should not be confused with the abbrevation Mbps, which refers to megabits per second.
MBps may also be written as MB/s.
Techopedia explains Megabytes Per Second (MBps)
While the data rates of computer network connections are usually measured in bits per second, non-network equipment data rates are sometimes shown in bytes per second measures, such as kilobytes per second (KBps), MBps or gigabytes per second (GBps).