thumbnail size "SD Card". Flat plastic holds a bunch of memory. They were used in cameras. go to Amazon and look up Bushnell Game camera. I picked "Bushnell Trophy Cam Trail Camera, Brown". its $139.49 today. I'm sure there are better, cheaper, etc. its just what I have and worked ok for me. Scroll down and there are "Frequently bought together" that adds two SD cards to the deal (less than $9 each). Then look up " SD card reader". there are a bunch of them. Less than $20. Either USB connection so you can download to a laptop or get one with a lightning connector to download to a iPhone.

it takes a while to program and use the first couple of times. I'm 65, I had to read the instructions a couple of times! Before he passed my 82 yr old FIL had the hang of it and really enjoyed them.