Windows DOS

USB Flash Drive Speed Test

Start a DOS command prompt in administrator mode.
- Click the Windows Start Menu.
- In the search text box type in "dos", but do not hit the enter key.
- Press [ctrl][shift][enter] to start a dos prompt in administration mode.
Start the File Explorer application to determine the flash drive letter.
- Click the Windows Start Menu.
- In the search text box type in "file explorer" and press [enter].
- Look along the left side of the application to determine the flash drive letter.
In the DOS window, type in the following command substituting the drive letter for "d":

winsat disk -drive d

The command will run for a minute or so with an occasional message. At the end it will report both the read speed and write speed separately.