I came across a wonderful, inexpensive and fast solution to backing up my SD cards when traveling. I use it as insurance that if the camera is stolen, or an SD card fails. The solution is a hack of the RavPower Filehub that I bought a year ago. It costs about 40$ and works as a link between my SD cards and any USB drive. I tend to us a few thumb drives, but any USB drive might work. Following the instructions on the website it took my about 45 mins to get it to work. I am not a computer programmer. I know other 'pro' solutions exist but for hundreds of dollars, and the WB drive that used to be sold is not well reviewed. So far after a few weeks the solution seems solid.