your post is a bit confusing, you say you have it connected to the router, then you say it is connected to the modem.
if you have a harddrive connected to the router, usually it will show up in your file manager under network. as far as your phone and other devices, you will have to go into your router settings and find them there using your browser.
I have a Lenovo B50-30 laptop with Windows 8.1
I'm trying to access a USB or portable hard drive I have plugged into the modem.
I have gone to my router settings homepage and enabled Samba.
The settings page confirms that there is a device connected.
When I go to the laptop, I cannot find any folders or files relating to the device plugged into the wifi.
There is 2 mobile phones and an ipad connected to the the wifi. Same story. Can't find any mention of devices plugged into the router.
Can someone assist me with this?