NEW Dantz DiskFit Pro v. 1.1 Macintosh Backup Software 3.5" Floppy SEALED
Macintosh Plus or newer. Based on my experience with floppies back in the 80s and 90s, there is about a 50/50 chance of previously used floppies working and their contents not being corrupted. I've never tried a NEW old disk like this one.