# PicoCalc SD cards cant be read

**URL:** <https://forum.clockworkpi.com/t/picocalc-sd-cards-cant-be-read/20843>\
**Category:** PicoCalc\
**Tags:** help\
**Created:** [December 24, 2025, 3:45pm UTC](https://forum.clockworkpi.com/t/picocalc-sd-cards-cant-be-read/20843 "2025-12-24T15:45:31Z")\
**Posts on this page:** 3\
**Page:** 2

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**Author:** ![tabemann](https://avatars.discourse-cdn.com/v4/letter/t/df705f/32.png) [@tabemann](https://forum.clockworkpi.com/u/tabemann)\
**Post date:** [December 27, 2025, 7:57pm UTC](https://forum.clockworkpi.com/t/picocalc-sd-cards-cant-be-read/20843/21 "2025-12-27T19:57:15Z")

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> [@ernst](#):
>
> Please note that with the Pimoroni Pico Plus 2W the WIFI + PSRAM is not (officially) supported by WebMite.

While PSRAM definitely requires special software support, I don’t see why WebMite would not actually work with the WiFi on the Pico Plus 2W unless it specifically relies on the flash being 4 MiB and specifically breaks compatibility with the Pico Plus 2W’s 16 MiB flash (which is difficult for me to see being the case, but could be in theory).

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**Author:** ![ernst](https://avatars.discourse-cdn.com/v4/letter/e/9f8e36/32.png) [@ernst](https://forum.clockworkpi.com/u/ernst)\
**Post date:** [December 27, 2025, 8:14pm UTC](https://forum.clockworkpi.com/t/picocalc-sd-cards-cant-be-read/20843/22 "2025-12-27T20:14:01Z")

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Reading is very important, what did I write ? WIFI + PSRAM, not Wifi only.

[https://forum.clockworkpi.com/t/can-psram-be-used-on-pimoroni-pico-plus-2w/18127](https://forum.clockworkpi.com/t/can-psram-be-used-on-pimoroni-pico-plus-2w/18127)

I can confirm, I studied the source code, I know why it does not work and I know why the author will not change that fact. Maybe I should ……

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**Author:** ![tabemann](https://avatars.discourse-cdn.com/v4/letter/t/df705f/32.png) [@tabemann](https://forum.clockworkpi.com/u/tabemann)\
**Post date:** [December 27, 2025, 8:40pm UTC](https://forum.clockworkpi.com/t/picocalc-sd-cards-cant-be-read/20843/23 "2025-12-27T20:40:48Z")

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Sigh. I _did_ read what you said, you were just unclear ─ “WIFI + PSRAM” can clearly be easily read as “WIFI and PSRAM”, which is precisely how I read your comment.

And I know full well how PSRAM on the Pico Plus 2W works, as I wrote a driver for it for zeptoforth. If you don’t write driver support for it it will never work, and it is a separate block of (significantly slower) memory from SRAM, so it does not just magically expand the amount of RAM available to the application without special application support.

(In the case of zeptoforth I decided to make there be an option to use it as a RAM disk, which is what my zeptoforth installer configures it to be used as.)

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