UFS is the soundbank format compatible with UVI Workstation, it is a container that contains the samples, the scripts, images and all of the soundbank's elements.
You can put it in the following default locations:
Macintosh HD/Library/Application Support/UVISoundBanks (on Mac)
C:\Program Files\UVISoundBanks (on Windows)
After that your soundbank will appear in UVI Workstation's Soundbanks list.