Review on 💾 Lexar Professional 667X 256GB MicroSDXC UHS-I/U3 Card | (LSDMI256BNA667A) | Enhanced SEO by Paul Stocks

Purchased to increase storage on Kindle Fire HD 8 (7th Gen). Works great - reads at 70MB/s and writes at 50MB/s consistently. Looking at other tests for micro SD cards in Kindle, the speed limit looks like it's a Kindle and not a card. On par with much more expensive UHS-II cards tested on the same Kindle Fire model. Warning - I first tested this with a crappy USB memory card reader and got crappy results. Installed A1 SD Bench (apk) and tested the card while it was in the device. . Much more accurate results. First you need to install ES File Explorer and also enable installation of unknown applications, but it's easy.