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Maping an external drive on CGN3 Gateway

I Plan to Stick Around

Hi Folks,

I have attached an external 1TB Hard Drive to my Gateway/Modem. How do I map it to access it?




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128 REPLIES 128

Maping an external drive on CGN3

I've Been Around

HI all


I am using hitron cisco device and configure a home network to share all my devices in home but i am not able to see my  hard drive or pen drive connected to the hitron in network ?


Can any one tell me how can i see the shared drive on network using my TV or tablet ?


Thaks in advance....

Maping an external drive on CGN3

Hi @sanju welcome to the forums. Thanks for your question.


Hello Community, is anyone able to assist @sanju ?

Maping an external drive on CGN3



THis thread has a couple of ways of doing it, via the PC at least.

Connecting to a tablet/TV.. it may differ.. all depends on how the device connects iteself..etc.

Some things like for video playback, etc.. may not be able to enter in the right type of address, etc.

Re: Maping an external drive on CGN3

@Gdkitty Thx for the info and the heads up! Always resourceful. Smiley Happy

Re: Maping an external drive on CGN3

Resident Expert
Resident Expert

Here is a possible solution to the problem, which is rather interesting.  An external hard drive dock that accepts 2.5' and 3.5' hard drives and USB 2.0 drives, has a card reader and a 100 Mb/s ethernet connection:


So, it you can't get the CGN3 to recognize the drive, possibly due to its existing format, this might do the job and more.  I've looked but can't find any store in Canada that happens to have one of these in stock, so, I haven't been able to find a price for this.


Looking around, this appears to require software to be loaded on computers or laptops, so it wouldn't work for TVs and probably tablets.


But, here is another device that could solve the USB to ethernet issue:


I also wonder if something simple such as this might work for a USB hard drive:


We have a couple of these around the house for laptops that don't have ethernet ports, and they work really well.

Re: Maping an external drive on CGN3

I ran into this problem and gave up on it long ago -- purchased WD MyCloud external hard drive, which has an Ethernet (network) jack that can be connected to your CGN3ROG.

I have my CGN3ROG connected to a 24-port D-Link switch, which also connects to 4 x WD MyCloud drives and my PCs. These MyCloud NAS drives are used to store documents, pictures and my DVD backups so that all networked clients in the home (including Apple tablets) can access the files easily.

You will have more joy if you take this route.

Re: Maping an external drive on CGN3

I 110% agree with that route.

WD and other networkable external hard drives, are definately MUCH easier to use.

Often show up as a device in mynetwork on the PC, can be easialy browsed to/shared to save files, etc.


They often have many other options as well, with their own custom apps for smarphones/tablets, which can allow you to access the files externally at any time.

Re: Maping an external drive on CGN3 Gateway

I've Been Around

Here's what I did:

1.  Log onto your router by typing into the address bar on your web browser  and enter your username and password into the prompt when it comes up

2.  Now that you are logged onto your router, across the top of your browser window you will see a navigation bar that says Status Basic Wireless Admin Security.  Select Admin

3.  Now, a few lines below the navigation bar on the top, you'll see another navigation bar that says: Management Diagnostics Backup Time Setting USB Storage Device Reset.  Select USB Storage.

4.  Now, if you USB device is connected, you should see it listed under either No. 1 (the top USB port) or No. 2 (the other USB port).  While you are here, make sure that the Shared status is Enabled.  Where you USB is listed, you will see a path that looks something like this: file://\share\26FE2EBDFE2E8561 Copy this path starting with the IP address (\share\26FE2EBDFE2E8561).

5.  Open your Computer folder from your desktop or start menu.  Click map network drive on the top navigation bar, or right click on the Network folder and select Map Network Drive

6.  In the prompt, select the desired drive letter, and where it says folder insert two backslashes and paste the path that you copied in step 4.  It should look like this: \\\share\26FE2EBDFE2E8561

7. Click Finish and voila your drive should be mapped.

Re: Maping an external drive on CGN3 Gateway

I've Been Around

What if, in step 4, there ar no USB ports listed. I have tried plugging my usb drive into either with the same result?

Re: Maping an external drive on CGN3 Gateway

Some people have found.. specific sizes.. brands.. formatting, etc.. wont always show up. 
It can be hit and miss of what works.

Re: Maping an external drive on CGN3 Gateway

I Plan to Stick Around

Good info in all the posts on this topic. I'm not sure this will answer the last one but it is something to try:


I connect a WD external drive (3TB) and the router recognizes and enables right away.  If I reboot the router with the drive connected, the router no longer recognizes the drive. I plug out the USB cable and plug it back in and then the router finds the drive again - weird.


My main problem is the used and free space properties - the router OS is unable to calculate this properly and even though I have 1TB free on the drive, the router mapping on Win7 says only 178Mb is free. How can this be corrected because the backup process will only attempt a file copy if there is sufficient free space? Windows must get this info from the router OS because when the drive is directly connected to the computer, the space is calculated correctly.


Re: Maping an external drive on CGN3 Gateway

I am surprised that Rogers has not taken advantage of this functionality. To be able to promote the Advanced wifi and new Rocket modems as supporting network storage would be a HUGE bonus for Rogers customers.


I have been trying for days to get drives to work. Flash drives seem to be fine, but anything bigger and with NTFS, no go. They appear in the modem firmware; flash drives get random numbers while the HDD got diska1, I can even eventually map the drive (though that's very difficult). But when I try to access it I get 2 problems: access is denied to do anything, and, as was mentioned, windows 7 says the volume is only 178MB (using 80GB). Tried gaining permissions through the security tab, and even get the login screen when trying to give "everyone" write access (entered the modem credentials), but those steps just result again in access denied.



Re: Maping an external drive on CGN3 Gateway

I'm a Trusted Contributor
According to Rogers' technical support they only support two things:

1. Any connectivity issues of the modem component. They will ensure that your signal levels are within specs and modem is registered correctly on the Rogers network.
2. They will help you to setup wireless component of the gateway.

That's it. They are not supposed (nor trained) to support other features of the gateway, like external USB storage or port forwarding. I was told that several times in plain English without any room for interpretation.

And I don't really have a problem with that. So, my point is that if you need extra features to work appropriately you are better of buying your own router.

I, personally used to use my own router only with Cisco DPC3825. I ran both CGNDM and CGNM in gateway mode and don't feel a need for a third party router, but again, every user's needs are different.

Another important point which frequently overlooked in this forum is that the same hardware (DPC3825, CGNDM, CGNM) can perform completely differently on different nodes. Many people are quick to blame the gateway, where in fact the problem is in node configuration. That is exactly the reason that there are some areas where Cisco DPC3825 won't work at all. You can swap them 50 times and none of them will work but once you put CGN2 - everything is perfect.

Re: Maping an external drive on CGN3 Gateway

I'm Here A Lot

I was able to get my 2TB HDD working on Rogers CGN3ACSMR Modem.


Although the CGN3ACSMR says it supports the following formats: (Window's FAT16, FAT32 and NTFS)

NTFS does not work at all. 


Solution that works is to Format you HDD to FAT32.

I used Fat32Formatter.exe to format my 2TB.


Plug it in the Modem and I was able to see the drive as file://


Copy this info and map a network drive on your PC. Note: Map a network drive using the following



Note: I remove the file: and replace the forward slash with BACK SLASH





Re: Maping an external drive on CGN3 Gateway

I've Been Here Awhile

FAT32 works on mine.

It sees it as disk, but that is not the thing you want to use.

Select the one with something like this:



exFAT detected as disk but not writable, NTFS not detected at all.


Re: Maping an external drive on CGN3 Gateway

I'm Here A Lot

hi to all,

i have a problem with my CG3NROG modem...i have attached my usb flash and i got this link for my usb:


but neither the browser and nor the mapping works..when i am trying to map \\\share\C48F-08EA


keeps asking for username and password.cusadmin and password does not works...what should i do?!

i also tried\cusadmin..didnt work.

Re: Maping an external drive on CGN3 Gateway

I've Been Around
I have the CGN3ACSMR and it recognized my 500GB HDD very smoothly, which is in NTFS format. I don't know if it's related to the version but my hardware version is 1A, while the software version is

The only problem is I only have read access to the HDD without being able to write/change anything. I am trying to modify the security settings to fix it but don't know if it'll work.

Re: Maping an external drive on CGN3 Gateway

Thanks for the detailed instructions - worked like a charm. I can now access my USB drive from any device on my network. you know if there's a way to remotely access that USB drive (i.e. from somewhere else on the Internet)?


I used to have this feature on my D-Link router (it had its own software which allowed me to access the USB drive which I attached to it)...unfortunately, the D-Link didn't play nice with my CGN3 (in bridge mode), so I've had to 'retire' the D-Link and use the CGN3 as both modem and router.


I do use Dropbox to share most documents across my devices through the cloud, but I do have some files which I would rather not put on someone else's servers.



Re: Maping an external drive on CGN3 Gateway

looking for the same thing (remote access) anyone?

Re: Maping an external drive on CGN3 Gateway

I Plan to Stick Around

Nice instructions. 


Just one thing though. When i select 'Finish' at the end of those steps, I'm prompted with an 'Enter Network Credentials' pop up screen. 

I've tried just about every 'User/pass' combination that I can think of. 


Does anyone know the correct combination to use? 

Whether it's the router info or my desktop info. Or is this happening due to something else that I am unaware of? 



Re: Maping an external drive on CGN3 Gateway

I'm not sure if its looking for the modem or pc/laptop credentials.  I would think, if its an issue with the pc/laptop mapping, that it would be looking for the admin account credentials for the pc/laptop and not the user account credentials that you would normally be logged into.  Maybe the pc/laptop operating system (Windows ?) treats network mapping as something that only an admin can carry out.  Have you tried that from the admin account?

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