so im taking a intro to photography class at my school. Last week, my teacher gave out nikons and we brought our own digital/sd cards so we could have photos. We returned the nikons and took our sd cards. Yesterday i got another nikon from him so i could use it for the weekend, and when i looked for the photos i took a couple days ago, they were gone.
Were they gone or are they just in different formats?

if they are a different camera they might just be hidden under a different folder.

If you haven't already pull the photos off the sd card w/ your computer then reformat the SD card with your nikon camera.

thank you