NXPowerLite for File Servers reclaims storage space by reducing the size of the existing files held on the server. NXPowerLite will compress PDF (new), Microsoft Office, Zip and JPEG files by up to 95%, meaning you can use space that was previously wasted again. You get the biggest single return the first time you run NXPowerLite. However, running it regularly ensures you slow down any subsequent growth in storage as new files are added.