The SDSQXCJ-256G-GS6MA is listed as a SanDisk Extreme PRO 256GB microSDXC memory card, offering double the storage of the 128GB model and a higher advertised write speed.
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Product specifications
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Model: SDSQXCJ-256G-GS6MA
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Brand: SanDisk
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Series: Extreme PRO
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Capacity: 256GB
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Format: microSDXC
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Interface: UHS-I
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Video speed class: V30
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Speed classes: U3, Class 10
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Application class: A2
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Maximum read speed: 250 MB/s
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Maximum write speed: 170 MB/s
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Warranty: Limited lifetime, as stated in your description; regional terms may vary.
Extreme PRO capacity comparison
| Capacity | Model | Read speed | Write speed |
|---|---|---|---|
| 32GB | SDSQXCO-032G-GS6MA | 100 MB/s | 90 MB/s |
| 64GB | SDSQXCU-064G-GS6MA | 200 MB/s | 90 MB/s |
| 128GB | SDSQXCJ-128G-GS6MA | 250 MB/s | 120 MB/s |
| 256GB | SDSQXCJ-256G-GS6MA | 250 MB/s | 170 MB/s |
The 256GB model provides twice the storage of the 128GB version, with the same advertised maximum read speed and a higher maximum write speed.
Important: Actual performance depends on the host device and card reader. The V30 rating indicates a minimum sustained sequential write speed of 30 MB/s under the relevant conditions; it does not guarantee the advertised 170 MB/s in every device.