Unable to set access permissions on NAS

I had an Iomega 4-bay NAS that functioned quite happily - accessible through Windows Explorer from any of the PCs on my ethernet wired network. Then the power plug/socket on the NAS overheated and trashed the device.

As a quick solution to retrieve the data on the disks I bought a used Netgear ReadyNAS NVX thinking I could simply put the disks in that and all would be well - wrong! The operating system on the Netgear is different to the Iomega so the disks could not be read.

In desperation, I used a data recovery tool to extract some information and then performed a factory reset on the Netgear so that all the disks were formatted to its system. They all appear as healthy in Netgear's Raidiator software on Firefox. The NAS also appears in Windows Explorer but any attempt to access it produces the message "...not accessible...you might not have permission to access this resource. This user can't sign in because this account is currently disabled."

Entering the NAS IP address (static) into a browser produces a sign-in box for Username and Password, but on entering the relevant words simply brings up the box again and again.

Please can anyone offer ways to gain access so that I can actually use these disks?