HP microSDXC mx330 64GB

  • Obtained from: AliExpress
  • Price paid: $2.59
  • Advertised capacity: 64GB
  • Logical capacity: 62,226,694,144 bytes
  • Physical capacity: 62,226,694,144 bytes
  • Fake/skimpy flash: Skimpy (2.77% skimp)
  • Protected area: 134,217,728 bytes (inaccessible)
  • Speed class markings: U3, V30, A1
  • CID data:
    • Manufacturer ID: 0x27*
    • OEM ID: 0x5048 (ASCII: PH)*
    • Product name: 0x5344363447 (ASCII: SD64G)
    • Product revision: 0x60
Sample #123Average
Manufacture dateSep 2023Sep 2023Aug 2023N/A
Serial number0xdaa7c5cb0xdaa7c0f20xda8b768fN/A
Sequential read speed (MB/sec)94.2094.1694.1694.17
Sequential write speed (MB/sec)45.0245.1845.5445.25
Random read speed (IOPS/sec)2,618.902,476.212,649.152,581.42
Random write speed (IOPS/sec)1,104.321,082.481,088.941,091.91
Read/write cycles to first errorNot yet determinedNot yet determinedNot yet determinedNot yet determined
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
Package frontN/A
Package backN/A
Card frontN/A
Card backN/A

* This manufacturer ID/OEM ID is pretty well known to be associated with Phison.


This is another card that came up as part of AliExpress’s “pick up to 10 items” sales. Looking at these cards, I’m not sure how they ended up in the Chinese market — there’s no Mandarin text on the package, and the languages that are on there (plus the presence of an EAN) tells me that these cards were likely intended for retail in Europe. But regardless, they made their way to China — or possibly never left China — so let’s take a closer look at them.

Even before opening the package, it’s pretty obvious that these cards were sourced from PNY. For starters, you can see PNY’s website in the authenticity seal on the front:

Second, there are support emails on the back that are at PNY.com:

And lastly, there are regulatory marks on the back that list PNY as the applicant:

So…these were made by (or sourced from*) PNY under license from HP.

But how well do they perform? Well…actually, pretty decent. All scores were above average, with two of the three cards getting random read scores that were more than one standard deviation above average, and all three cards getting random write scores that were more than two standard deviations above average. They scored in the 82nd percentile for random read speed, and in the 95th percentile for random write speeds. In fact, the lowest of all the performance measurements — which was the sequential write speed on sample #1 — put it in the 73rd percentile.

These cards carry the U3, V30, and A1 marks — and they performed well enough to qualify for all three of them. Not a bad deal for under $3.

Endurance tests for all three samples are still ongoing. None of the three has made it to the 2,000 read/write cycle mark; samples #1 and #2 are not expected to get there until September 2024, while sample #3 is not expected to get there until October 2024.

* The manufacturer ID being used by these cards is assigned to Phison — so it would seem that PNY licensed the naming rights from HP, then had Phison manufacture the cards for them.

June 8th, 2024

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