Accessing EXT3 external harddrive connected to the front USB of the ReadyNAS Pro from Windows

The Netgear ReadyNAS Pro (Linux inside I presume) allows for its data to be backed up to an external harddrive connected to the front USB port of the the ReadyNAS. In the past I have always formatted the external drives as NTFS and my backups always had errors as a result. However, I have always been able to use a Windows server to navigate, using Windows Explorer, across the network to My Network Places\readynaspro\usb_hdd_1 and have full access to the backed up files on the USB external HDD.
We now have some new, larger harddrives (8TB) and I have formatted my first one as EXT3. I would like to have the same access to the files and folders as I had with the NTFS drives. Remarkably I seem to be able to view and even open some of the backed up files. However, I don't seem to be able to create any folders for instance. My problem is that I would like to be able to make changes to the folder structure on the external drive, so that I can put different backups into different folders etc. So, in the past I have been able to do this kind of thing from my Windows server using windows explorer and expanding: My Network Places\readynaspro\usb_hdd_1

I downloaded Ext2 File System Driver (Ext2FSD). However, this does not seem to have a facility for me to navigate to the usb_hdd_1 to mount that.

Will ExtFS allow me full access to an ext3 external hard drive (connected via USB to the ReadyNAS) over the network?

Thank you

 

OK, I was thinking about this all wrong. The ReadyNAS Pro must be running Samba so I ought to be able to read and write using windows explorer across the network when the external hard drive is connected to the ReadyNAS Pro. I was just experiencing some strange glitches.