using sd cards to supplement the minimal ssd has its advantages and disadvantages. advantages like it doesn't stick out on the side the way a thumbdrive does. disadvantages like the data corruption in evidence. memory in an sd card isn't stored in a physically addressed space like with magnetic drives and tapes. it's stored in logic gates on a printed circuit and is moved around to suit processes like wear leveling. i bought transcend 32gb sdhc cards that were recommended here by other users and they worked fine until i tried writing a file that was over 4gb. that's when i discovered they came formatted in fat32. so i reformatted them. the problems started when i put more than a few gb on one of them. files turned into garbage like the screen grabbed example attached to this post. i also lost some work when i didn't realize that a backup overwrote uncorrupted copies on an external magnetic hdd. i fully reformatted back to fat32, but the problem persists. i also tried an sd card formatter by hp. i am basically stuck with a pair of $50 guitar picks.