CrystalDiskMark Portable 8.0.0a disk benckmark tool
CrystalDiskMark can measure sequential reads/writes speed, measure random 512KB, 4KB, 4KB (Queue Depth=32) reads/writes speed, has support for different types of test data (Random, 0Fill, 1Fill), includes basic theme support and has multilingual support (though it will not yet remember your language selection between runs).
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