So as cameras have gotten more and more complex, they've added a whole list of features that really should be avoided at all costs.
One of those features is cropping in-camera. While it can be nice if you're on the fly and you just want to get a photo cropped in quickly, it's again something I would never really recommend.
Oftentimes you might want to crop your photos; maybe you got a finger in the shot or there are some things on the side that doesn't look good, and that's great but we wouldn't recommend doing it in-camera.
You can double check when cropping your photos in-camera as most of them will save a secondary file cropped in and your original one. But again, it's always just better to do that on a computer screen where you can see your image in all its glory and really see what you've got there and crop accordingly. Don't crop in-camera.