The micro:bit can be connected to your computer or device with a micro USB cable that is capable of data transfer (not just charging). Data can be sent and received between the BBC micro:bit and the computer so programs can be downloaded from Windows, Mac, ChromeOS (Chromebooks) and Linux (including Raspberry Pi) onto the micro:bit via this USB data connection.
Connect the small end of the cable to your micro:bit and the other end to your computer's USB port. The micro:bit will show up as a disk drive called MICROBIT
If possible, avoid using USB ports on computers designed for charging devices (they are often marked with a lightning bolt or 'SS'). They supply a higher current than the micro:bit is designed to handle, and you may cause damage to your micro:bit. You may introduce a USB hub between the high current port and the micro:bit to overcome this issue, providing that the hub is also not marked for high speed 'SS' use.
Don't see the MICROBIT drive?
If you need to check the micro:bit has mounted as a drive called MICROBIT
Windows - open Device Manager and look under Disk Drives
Mac OS - open Disk Utility from Aplications > Utilities
Chrome OS - Open the Files app.
Ubuntu - open Disks
Raspbian - open File Manager
In each utility the micro:bit should be listed as an external drive.
For troubleshooting see our article on fault finding with the micro:bit