Using fsutil
Let's create a 21.5MB file (22544384 = 1024 * 1024 * 21.5).
fsutil file createNew 21.5MB.iso 22544384
3 steps to extend wi-fi coverage using DrayTek VigorAP 910C Set Operation Mode to Universal Repeater mode VigorAP 910C: Set Operation Mode Configuration to Universal Repeater Connect DrayTek VigorAP 910C to existing Wi-Fi Access Point Connect DrayTek VigorAP 910C to existing Wi-Fi Access Point Set Security Mode & Pass Phrase for DrayTek VigorAP 910C Set Security Mode & Pass Phrase for DrayTek VigorAP 910C Check Online Status