Sadly OP is behind the times here. The storage industry has pretty much co-opted GB to mean 1000^3 bytes, which is why you see folks in the know refering to GiB for the power-of-two-numbers. This is super-frustrating, but it's been like that for decades (literally: this was finally "officially" resolved in the late 90's by the IEC).
It's frustrating that SanDisk used to give you extra bytes and they stopped -- and everyone including me HATES it when products get worse with no external indication that they changed.......but let's be honest: it's kind of SanDisk's primary MO to buy the cheapest NAND they can find and sell it on the consumer market.
It's frustrating that SanDisk used to give you extra bytes and they stopped -- and everyone including me HATES it when products get worse with no external indication that they changed.......but let's be honest: it's kind of SanDisk's primary MO to buy the cheapest NAND they can find and sell it on the consumer market.