
Never buy SD cards from unreliable sources. Run h2testw, which checks the SD card reads and writes, simulates it filling up over time, and then checks md5. The capacity of both SD cards was 29GB, and the remaining 100GB or so is corrupt memory, which means there was no space there.

Memory card Samsung microSDXC 256 GB Class 10, V30, A2, UHS-I U3, R 130 MB/s, adapter to SD
50 Review

๐ฝ 512GB Samsung Evo Plus Micro SDXC Memory Card
40 Review

Smartphone Xiaomi Mi 8 Lite 6/128 GB, midnight black
70 Review

SmartBuy Classic Series microSDHC 32 GB Class 10, R/W 25/30 MB/s, SD adapter
41 Review