If you are like me and have a NAS device on your network that is not compatible with Windows Vista, now you can tweak Windows Vista to make it work again. You do not even have to wait for your device manufacturer to release a new firmware any more! Just follow these steps below:

Click on the Start Button and key in secpol.msc in the search box and hit Enter.
When the Local Security Policy editor has loaded, expand Local Policies and select Security Options.
Scroll through the list and locate "Network Security: LAN Manager authentication level." Right click on this setting and select Properties.
Change the setting to "Send LM & NTML - use NTLMv2 session security if negotiated"
Hit OK and your NAS will work again.
Using theses instructions I was able to make my 1 TB Buffalo TeraStation work with Windows Vista. Prior to changing the authentication level, I could not access any secured shares on my NAS.