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SanDisk ULTRA 64GB microSDXC Card Class 10 review, lots of storage on the cheap
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2013/02/27 - 19:02
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High capacity microSD cards offering 64 GB storage have been introduced almost a year ago at a rather high cost (more than $150/€150). Since then, prices have considerably dropped and these little cards are now quite affordable (under €50, £40 or $65) and offer a great accessory to increase your tablet storage space.
The SanDisk ULTRA 64GB card we are checking in this article offers a great Class 10 speed and follows the SDXC format (Secure Digital eXtended Capacity) that breaks the limit of 32 GB from the SDHC card standard.

SANDISK_Micro_SXHC_64GB_card_and_adapter_0445bImage Enlarger

SanDisk ULTRA 64GB microSDXC packaging and specifications (SDSDQU-064G-U46A product #)

SanDisk gives the following specifications for their product:

  • Class 10 Class 10 UHS-I speed (10 Mbytes/s writing speed)
  • durable Design: Waterproof, X-ray proof, temperature proof (-13 to 185 degrees Fahrenheit), and shockproof
  • includes an SD card adapter for compatibility with SD-enabled devices, such as cameras, camcorders, and laptops
  • the Ultra microSDHC/microSDXC UHS-I cards are backed by a lifetime limited warranty (see SanDisk site for details)
  • SANDISK_Micro_SXHC_64GB_front_DSC_0298_c SANDISK_Micro_SXHC_64GB_back_DSC_0316_c

    SanDisk 64GB ULTRA microSDXC Performance

    The card is rated as Class 10, that asserts a minimum speed of 10 MB per second on non-fragmented sequential writes. UHS-I symbol relates to the Ultra-High Speed (UHS) that provides enhanced clock frequency compared to the original standards.

    We used the following test setup to evaluate the SanDisk 64GB ULTRA microSDXC performance: x86-64 PC, 8 GB RAM, Windows 7, Transcend Multi-Card Reader M3 connected to computer thru USB 2.0 cable.

    CrystalDiskMark 3.0.2 x64 benchmark
    3 test runs, 100 MB test size
    SANDISK_Micro_SXHC_64GB_CrystalDiskMark302x64_resultImage Enlarger
    (MB/s = 1,000,000 bytes/s)

    ATTO Disk Benchmark (DISK32) version 2.47 benchmark
    0.5 to 8192 KB transfer size, Forced Write Access, I/O comparison 512 MB total length, random test pattern
    SANDISK_Micro_SXHC_64GB_ATTO_diskbenchmark_2_47_resultImage Enlarger

    On our test setup with these two benchmarks, we can see the SanDisk 64 GB is a little below the Class 10 specification, with sequential writing speed around 9.5 MB/s, the…

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