Megabyte是什麼意思

"Megabyte" (MB) is a unit of measurement for digital information or data storage. It is equal to 1,048,576 bytes (2^20 bytes), or approximately 1 million bytes. It is commonly used to measure the storage capacity of computer hard drives, memory, and data transmission speeds.

Here's a rough comparison of data storage units:

• Bit (b): The smallest unit of data, representing a single binary value (0 or 1).
• Byte (B): 8 bits, commonly used to represent a single character or symbol.
• Kilobyte (KB): 1,024 bytes, often used to measure small amounts of data, such as a text file.
• Megabyte (MB): 1,024 kilobytes, typically used to measure the size of a typical document or small media files.
• Gigabyte (GB): 1,024 megabytes, commonly used to measure the storage capacity of hard drives and the size of large media files.
• Terabyte (TB): 1,024 gigabytes, often used for large data centers, server storage, and backups.
• Petabyte (PB): 1,024 terabytes, a very large amount of data used in scientific research, cloud storage, and large-scale data processing.
• Exabyte (EB): 1,024 petabytes, an extremely large amount of data that is typically only used by large-scale enterprises and national-level data systems.

When discussing data transmission speeds, megabytes per second (MB/s) is used to measure how fast data can be transferred from one place to another. For example, a fast solid-state drive (SSD) might have a read speed of several hundred MB/s, while a traditional hard drive might be limited to a few dozen MB/s.