I have tons of pics on sd that I take with my Nixon L 830. now all the sudden it says I haven't formatted. how do I save pics

Solution
Move the images off the SD card at the earliest opportunity. Every day.
SD cards are a transitory storage solution, at best.

Try it in a different card reader or computer. See what happens.


Formatting will always make it worse, so don't do that.

There's really nothing you can do that won't risk further data corruption, so you need to send it to a data recovery lab that can recover from monolithic flash devices like SD cards and hope that it doesn't require a rebuild.