Amazon Basics 64GB

  • Obtained from: Amazon
  • Price paid: $9.41*
  • Advertised size: 64GB
  • Logical capacity: 63,281,561,600 bytes
  • Physical capacity: 63,281,561,600 bytes
  • Fake/skimpy flash: Skimpy (1.12% skimp)
  • Protected area: 134,217,728 bytes
  • Adjusted skimp: 0.91%
  • Speed class markings: Class 10, U3, V30, A2
  • CID data:
    • Manufacturer ID: 0xad
    • OEM ID: 0x4c53 (ASCII: LS)
    • Product name: 0x5553443030 (ASCII: USD00)
    • Product revision: 0x10
Sample #1234Average
Manufacture dateJan 2024Jan 2024Jan 2024Jan 2024N/A
Serial number0x3a10ae5f0x3a10ae560x3207eeed0x3056d43cN/A
Sequential read speed (MB/sec)90.1989.6489.6591.7690.31
Sequential write speed (MB/sec)39.8439.2139.4346.4441.23
Random read speed (IOPS/sec)2,402.612,264.252,234.532,368.982,317.59
Random write speed (IOPS/sec)457.89739.63725.03736.56664.78
Read/write cycles to first errorNot yet determinedNot yet determinedNot yet determinedNot yet testedNot yet determined
Read/write cycles to complete failureNot yet determinedNot yet determinedNot yet determinedNot yet testedNot yet determined
Total days to complete failureNot yet determinedNot yet determinedNot yet determinedNot yet testedNot yet determined
Card reader usedJJS CR-UTC4ACJJS CR-UTC4ACJJS CR-UTC4ACNot yet testedN/A
Package frontN/A
Package backN/A
Package topN/A
Card frontN/A
Card backN/A

* These cards were sold as a two-pack; the price shown represents half the price of the two-pack.

Discussion

Amazon has been slapping their brand name on just about everything with their Amazon Basics brand — and microSD cards have been no exception. I don’t think I’ve ever bought any electronics in the Amazon Basics brand — so this will be a first for me.

Amazon obviously doesn’t have their own silicon foundries (or do they?), so there’s a question to be asked: who made this card? The sources that I normally go to don’t have anything on manufacturer ID 0xad. I’ve seen this manufacturer ID (and OEM ID 0x4c53) a few times now: with the Chuxia 32GB, the OV 32GB, and — most importantly — the Lexar Blue 633x 32GB. The Lexar brand was purchased by Longsys in 2017, so I think I’m just going to call it: I think manufacturer ID 0xad belongs to Longsys. All of their cards that I’ve seen so far have OEM ID 0x4c53 — which, when translated into ASCII, becomes LS — which I believe to be an abbreviation for Longsys. So yeah — I think these cards were manufactured for Amazon by Longsys.

Performance on these cards was decent. All scores were above average, with two of the three samples getting random write speeds that were more than one standard deviation above average. The lowest score was the sequential read speed on sample #3; at 89.65MB/sec, it came in at the 62nd percentile.

Endurance tests for all four cards are still ongoing. None of the three has hit 2,000 read/write cycles yet.

  • Sample #1 is estimated to reach this point sometime in August 2024.
  • Sample #2 is estimated to reach this point sometime in October 2024.
  • Sample #3 is estimated to reach this point sometime in September 2024.
  • Sample #4 is estimated to reach this point sometime in January 2025.

July 5, 2024

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