If you are unable to get the legacy software working, it is not strictly necessary. Once you know the IP address of the drive (found via your router settings), you can map the drive manually:
The most reliable place to download the software is directly from the manufacturer's support portal. Freecom is now part of the group (which is part of the Mitsubishi Chemical Holdings Group). freecom network storage assistant software download
If the legacy software crashes on Windows 11 (it likely will due to missing Visual C++ 2005 runtimes), you have two options: If you are unable to get the legacy
Connect your Freecom Network Drive directly to your router or switch via an Ethernet cable. If the legacy software crashes on Windows 11
While originally designed for Windows XP and Vista, later versions (2.0+) are known to work on Windows 7, 10, and 11.