Try this simpler route. Slide the SD adapter lock to ON to keep it read only. Put the bad card in your camera. Insert a new, known good card in the second slot. Format only the new card in camera. Open the Playback menu, choose Copy images or Transfer. Select All. Start the copy. Many bodies read files even when Windows says format. If your camera lacks two slots, take the locked card to a photo lab kiosk. Copy to a USB stick there. Kiosks often read quirky cards. Get your photos, then retire teh old card. Dont reuse it.