Per our NetVault User's Guide, NPK files are installed in 2 ways. You can install the NPK using the NV Configurator -> Tab Packages -> Install Software and then point the browse window to the NPK file. Or you can install the NPK using the NV GUI in Client Management -> Right Click on the server or client you are attaching the device to -> Select Install Software -> point browse window to NPK file. Then the NPK will be installed into NV and you can add the 420LTO. Doing it the Configurator method only installs the template on the NV Server and if that's where the device isdirectly attached to, that's fine. But the Client Management method can be used if you are installing the template on a remote client and the device is locally attached to the client (not the server). So you have to install the template where ever the drive is locally attached.Download Driver Pack
After your driver has been downloaded, follow these simple steps to install it.
Expand the archive file (if the download file is in zip or rar format).
If the expanded file has an .exe extension, double click it and follow the installation instructions.
Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.
Find the device and model you want to update in the device list.
Double-click on it to open the Properties dialog box.
From the Properties dialog box, select the Driver tab.
Click the Update Driver button, then follow the instructions.
Very important: You must reboot your system to ensure that any driver updates have taken effect.
For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.