@Pleng I think he might be referring to the oddball 200 and 400GB sizes that were released, although I always assumed there were actual hardware changes to make those sizes possible, and simply not higher binned 128/256 GB cards that were capable of (had enough spare good sectors) to fit 200 and 400GB of data. I don't think there are actually that many extra sectors set apart. On a SSD you typically see 120GB, 240GB etc sizes with 8, 16 etc. set apart for spare sectors, which is not actually that much. SD cards I always thought had no spare sectors on them as they are manufactured to cost, and you always see them sold with the "full" capacity of 128/256 etc rather than 120/240 etc. But maybe I am wrong there.