hi there while connected to my computer , windows scanned and fixed the file system on my nuvi 260 . needless too say that trashed the unit . it only shows 670mb of disk space used and 571 mb free and most files are gone, only autorun.inf file and folders JPEG and GARMIN are left. where can i get the software to restore the files/operating system ? map img file is gone and not enough space left to load one .