Yes. Most floppies had a write protect tab you would slide to set whether writing was protected or not. However, when buying games some floppies didn't have that tab exposed because the write protection was supposed to be set by the manufacturers when they created them for sale. On some games, they messed up and set the disk write protect to the unprotected setting (thus disabling write protection) on ALL of the disks and not just the disk they intended you to use for saves. If you didn't read carefully, forgot, or were playing a foreign imported game in a language you don't quite understand, you might accidentally write a save onto a disk you weren't supposed to, and the games with this problem usually didn't check to see if there were important files it was overwriting before just writing the save file.