You may experience the following message when trying to install a Soundbank or a Falcon Expansion via UVI Portal although you have enough free space on the destination disk(s):
"ERROR INSTALLING [ProductName]
Not enough space on your computer or hard drive to install this product."
When installing a Soundbank or a Falcon Expansion, UVI Portal actually requires temporary space to handle downloaded files (RAR archives) before extracting then deleting them once the installation is done. Technically, this means that you need enough free space for both the downloaded and the installed files during the installation process.
The workaround is to select a different download folder, not located on the same disk used for Soundbanks and Falcon Expansions. You can change this download location via the Advanced section in UVI Portal's Preferences.
Alternatively, you can also select a location on a different disk for your Soundbank or Falcon Expansion via Preferences > UFS Paths > Install To.