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SC_Stigmata's avatar
SC_Stigmata
Tutor
Oct 26, 2020

C7100V cable modem/router will not recognize external USB device

Modem/Router doesn't recognize external HD.  This seems to be an issue with this model.  Previous solutions (replace until you get one that works) and power cycle (reset) and hope that works.  Any ot...
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Hardware
Troubleshooting
SC_Stigmata's avatar
SC_Stigmata
Tutor
Oct 26, 2020

Hello,  I've tried two.  They are both WD My Passport.  Both are less than 3 years old.  One is a 1T and the other 2T.  Neither have their own power source.  They both are powered through the USB connection. That was one concern I had.  Maybe it requires external pwr.? 

FURRYe38's avatar
FURRYe38
Guru - Experienced User
Oct 26, 2020

Some larger sized drives need more port than what modems and routers can provide. 

However to test this out, find a small usb flash drive and connect it to the modem, is it seen by the modem at all? Anything from 8Gb to 64Gb usb flash drive should work.