Tech enthusiast Matt Cole has created a comprehensive MicroSD card testing database, writing over 18 petabytes of data across nearly 200 cards since July 2023. Cole's "Great MicroSD Card Survey" uses eight machines running 70 card readers around the clock, writing 101 terabytes daily to test authenticity, performance, and endurance. The 15,000-word report covering over 200 different cards reveals significant quality disparities. Name-brand cards purchased from Amazon performed markedly better than identical models from AliExpress, while cards with "fake flash" -- inflated capacity ratings -- performed significantly worse than authentic storage. Sandisk and Kingston cards averaged 4,634 and 3,555 read/write cycles before first error, respectively, while Lenovo cards averaged just 291 cycles. Some off-brand cards failed after only 27 cycles. Cole tested 51 cards to complete destruction during the endurance testing phase.Read more of this story at Slashdot.