Re: advice before purchase
Those problems generally occur for one of two reasons: a dead SD card or trouble with the connections.
Try another card if you have one, and post a photo of your hardware. We need images large enough, well enough lit, and well enough focused to see details, but the forum software puts a limit on file sizes. 800x600 images generally work best.
When you void a product warranty, you give up your right to sue the manufacturer if something goes wrong and accept full responsibility for whatever happens next. And then you truly own the product.