I almost hesitate to ask this question as the answer is probably obvious but it has escaped me so far. In the past, we have carried a laptop when traveling and would remove the SD card from the camera each evening, put it in the SD slot on the laptop, and download our photos as a backup. We do not plan to carry a laptop on our trip to Italy but will take a Kindle Fire HD and maybe an iPad, neither of which have slots for an SD card or even a USB port. I had thought there might be some sort of external memory device with an SD card slot but the only ones I have seen are bulky and cost several hundred dollars. The card readers appear to require a connection to a device with a USB port to download the photos. We currently use a Canon Powershot SX20IS but may upgrade to a Nikon Coolpix L830 or Canon Powershot SX510 HS, which has WiFi capabilities.
I am pretty tech challenged, so any assistance will be greatly appreciated. I live in fear of losing my camera and all of my photos if I don't have a way of backing them up while traveling.