Asus TS700-E7/RS8 - Manual (Page 174)

7-14 Chapter 7: Driver installation
Chapter 7
6. Select Back and follow the onscreen instructions to finish the installation.
5. When the screen below appears, select the USB floppy disk drive (sda) as
the driver update medium. Select OK, then press <Enter>.
Please choose the Driver Update medium.
sda: USB Floppy
other device
OK Back