... | ... | @@ -48,11 +48,11 @@ Purism forum users irvinewade and Quarnero have benchmarked the microSD card and |
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| Device | µSD read | µSD write | eMMC read | eMMC write|
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|-------------------------------------------|----------|-----------|-----------|-----------|
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| Librem 5 (with SanDisk Ultra C10 U1 512GB)| 11 - 12 | 10 | 57 | 22 |
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| Librem 5 (with SanDisk Ultra C10 U1 512GB)| 11 - 12* | 10 | 57 | 22 |
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| PinePhone (with HP mx310 UHS-I U1 64GB) | 11.9 | 10.0 | 76.8 | 16.5 |
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| x86 PC (with SanDisk Ultra C10 U1 512GB) | 85 | 37 | | |
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| x86 PC (with HP mx310 UHS-I U1 64GB) | 87.0 | 36.8 | | |
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\* Using `dd` instead of `hdparm`.
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*Sources: [irvinewade](https://forums.puri.sm/t/myl5-australia-new-zealand/11526/83) using SanDisk Ultra C10 U1 512GB microSDXC with the Librem 5 and a USB 3.0 card reader connected to a USB 3.0 port in a middle-of-the-range x86 PC; [Quarnero](https://forums.puri.sm/t/what-are-the-specs-of-the-librem-5-sd-card-reader/9608/27) using a HP mx310 UHS-I U1 100MB/s 64GB microSDXC with the PinePhone and a x86 PC.*
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The storage on both phones is slow, so expect these phones to take longer when shooting photos/video and transferring files than the standard smartphone. The read and write speeds of microSD cards are quite similar on the Librem 5 and PinePhone, and the same microSD cards perform much better on an x86 PC. Both phones use a USB 2.0 bus to connect to their microSD cards. USB 2.0 is a protocol that supports up to 60 MB/s, but it is half-duplex, so its maximum speed should be between 30 and 40 MB/s. The i.MX 8M Quad processor in the Librem 5 supports USB 3.0, but the microSD card in the Librem 5 is limited to USB 2.0, because the same USB bus that connects to the microSD card, is also connected to the WiFi/Bluetooth and cellular modem, which both only support USB 2.0.
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