Review on Reliable and High Performance Transcend 256GB SDXC/SDHC 300S Memory Card - TS256GSDC300S by Paul Letho

Okay, I know it's not a Sandisk brand, but half a terabyte for $60 isn't bad. A bit slow to read, I can judge from the Sandisk 128GB version. It tends to drop frames when I'm reading multiple videos (evaluating security clips at the same time). Edit (29 Aug 2019): I just tested the LEXAR 512GB MicroSDXC (blue label design) and it's slow. If you need cheap big storage, get Transcend. Avoid Lexar.