I'll try to be more explicite:
The usb drive is recognized and shows up as usb_A1 with 3.65GB.
I created a user called "me" with read/write access. I save. I restart the router and I can still see "me" with read/write access.
at the bottom of the page there is a link to follow to get to the SharePort Web Access like http://xx.xx.xx.xx:8181/
xx.xx.xx.xx being my IP address.
I click on that link and fill in name and password. I click on the menu icon on the top right I come to a page where I can see:
"My Access Device Hard Drive" with "usb_A1" under. I wish I could put a screen shot on this post but I just can get it to paste.
If I click on "usb_A1", I get a message "Error: insufficient permission."
I cannot create a folder and I cannot upload a file.
I read the proposed solution from http://forums.dlink.com/index.php?topic=50995.0
So I used command run: \\192.168.0.1. The drive showed up usb_A1 in an explorer window, directly without asking for any user name or password.
From this explorer I can copy (upload) files.
So yes it works but not really as supposed.
I haven't tried from a computer outside my home network. Now I'm trying from computer attached to the router.
I created a folder called "shared" on the drive (via explorer, not via SharePort Web Access since it does not work).
I gave my user read/write access to this "shared" folder via the storage menu but it is the same problem.
I tried to access it via http://192.168.0.1:8181/ instead but it is just the same.