The NVFS, as claimed by palmOne, is a file system designed to keep all information safe should the battery run out of power.
A similar feature has been adopted by PDAs running the Windows Mobile 5.0 operating system, and is named "Persistent Storage".
palmOne responded to this complaint by offering a free 128 megabyte SD card on request to selected customers.
(It is recommended those having earlier versions of the Palm Treo 650 and Tungsten T5 install the NVFS Fix at the earliest possible convenience).
According to Palm Info Center on June 22, 2005, the palmOne Tungsten T5 Version 1.1 Update fixes the NVFS File System Inefficiency Problem since its release in November 2004.