Kioxia Exceria G2 64GB

  • Obtained from: AliExpress
  • Price paid: $4.79*
  • Advertised capacity: 64GB
  • Logical capacity: 61,891,149,824 bytes
  • Physical capacity: 61,891,149,824 bytes
  • Fake/skimpy flash: Skimpy (3.30% skimp)
  • Protected area: 134,217,728 bytes (inaccessible)
  • Speed class markings: Class 10, U30, V30, A1
  • CID data:
    • Manufacturer ID: 0x02**
    • OEM ID: 0x544d (ASCII: TM)**
    • Product name: 0x5345303634 (ASCII: SE064)
    • Product revision: 0x89

* The price shown is for the 32GB version. See the discussion for more information.

** This manufacturer ID/OEM ID is well known to be associated with Toshiba/Kioxia.

Sample #123Average
Serial number0xf4847fb30xf484c2b30xf484c1b3N/A
Manufacture dateOct 2022Oct 2022Oct 2022N/A
Sequential read speed (MB/sec)87.7991.1194.0590.98
Sequential write speed (MB/sec)50.9350.0362.0654.34
Random read speed (IOPS/sec)3416.562294.912367.292692.92
Random write speed (IOPS/sec)826.33610.67683.05706.68
Read/write cycles to first error5,109895Not yet determined3,002
Read/write cycles to complete failureNot yet determinedNot yet determinedNot yet determinedNot yet determined
Total days to complete failureNot yet determinedNot yet determinedNot yet determinedNot yet determined
Card reader usedSmartQ SingleJJS CR-UTC4ACJJS CR-UTC4ACN/A
Package frontN/A
Package backNot availableN/A
Card frontN/A
Card backNot availableN/A


First things first — I actually ordered the 32GB version; the seller sent me the 64GB version. I don’t know if the seller simply made a mistake or if they were out of the 32GB version and sent me the 64GB as a replacement — but whatever. Free upgrade!

Performance-wise, these cards actually did rather well. All three cards had sequential write speeds that were more than one standard deviation above average, with the lowest measurement putting it in the 84th percentile. Sample #1 had a random read speed that was more than two standard deviations above average, and a random write speed that was more than one standard deviation above average. The lowest of the random read speeds put it in the 75th percentile, while the lowest of the random write speeds put it in the 81st percentile.

As of this writing, all three cards are still undergoing endurance testing:

  • Sample #1 has experienced errors, but it made it well past the 2,000 read/write cycle mark before doing so — its first error was during round 5,110, and it has survived 6,554 read/write cycles overall so far.
  • Sample #2 survived 895 read/write cycles before it experienced a data mismatch error; however, the error only affected 8 sectors and has not recurred since. It has currently survived 3,913 read/write cycles so far.
  • Sample #3 has survived 3,107 read/write cycles so far, and has yet to experience any errors.

June 9, 2024

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