Only 1 Mapped Network Drive?

I'm noticing that I'm only able to map one network drive to my backup storage (it's a portable drive connected to a router). If I want to connect with another user, I have to disconnect the current connection, otherwise I get a message "Access is denied".

Is there a way to allow for concurrently mapped drives?

Basically the method I'm using to map a network drive is in Windows Explorer. This PC>Map Network Drive... and enter the server link and credentials. On the credentials screen is where I see the Access is denied message.

Samuria said:

Is the username and passworrd different on both drive setting credentials the same would make it simple

I basically have three users for the router. The admin, person 1 and person 2. Each "Person" has their own folder to access. That's how it's set up. The folders are located on the same attached physical disk, which happens to be a 5TB WD Game Drive.