A sample file download speed test is a simple online tool that measures the speed at which you can download a file from a server to your device. The test works by transferring a small sample file from a remote server to your device, and then measuring the time it takes to complete the transfer. The result is then displayed as a download speed, usually measured in megabits per second (Mbps) or megabytes per second (MB/s).
Performing this test is simple, but accuracy requires discipline. Follow this step-by-step protocol. sample file download speed test