Missing 4gb of space on San Disk 64 Gb microSD / microSDXC card [ 59.45 gb total space ??]

Memory Cards Mobile memory, professional cards and all other st
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The 1000 byte vs 1024 byte explains away more than just a gigabyte and a half. The binary GIGA prefix means 2^30, or 1024*1024*1024, while GIGA everywhere else means 10^9, or 1000*1000*1000. (64*10^9)/2^30 = 59.60. I would imagine the last 0.2 GB is lost to the file system.