Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Skip to content

SD Card (SDEX) not available/detected anymore

  • /e/OS version: /e/OS 3.0.4-a15-202507085007307-official-FP6
  • Device model(s): FP6 e/OS
  • Impacted Application: e/OS
  • Affected application/URL: -
  • Browser/client and version: -

The problem

TL;DR: I bought a brand new SD Card with my FP6 e/OS Edition. The SD card worked fine for the first few weeks, but then stopped being detected. It works fine on other systems and seems to be a software issue (see Technical Details).

Steps to reproduce

  1. Buy a brand new SDExpress SD Card
  2. Use it a few weeks in your new FP6 e/OS Edition

Technical details

I did the following testing with the following SD cards:

SD-A: Old, 64GB Samsung Pro SDXC, UHS-I, 90R/50W

SD-B: New, 256GB Integral Gamer’s Edge X, SDEx-I, 890R/750W

On the topic of SD Express vs SDXC: The new SD Express standard should be fully backward-compatible with UHS-I readers and devices [1, p.4 and p.7].

Now, here are my results regarding the SD Cards:

  • SD-B (New) worked fine for the first few weeks with my e/OS FP6 but stopped getting recognized after some time. SD-B was factory-delivered with a GPT partition table and exfat.

  • SD-B is fully functional on a PC in this configuration, all files are still available as before, the FP6 just doesn’t recognize it anymore. Even after checking hardware issues by inserting a physical SIM on the other side of the slot to ensure proper pressure on the pins.

  • SD-A was tested as confirmation - the SIM card was not needed for reorganization by the FP6. Everything works fine out of the box. I did not try a long-term test though. SD-A was factory-delivered with a msdos partition table and exfat.

  • I reformatted SD-B to the same standard as SD-A, therefore SD-B now provides a msdos parition table and exfat. SD-B is still not recognized but works on PC as always.

  • I took a sharpie and blocked out the extra pins of the SD-B to rule out a hardware issue on this end. Same results, data transfer, recognition etc. works fine on PC, but the FP6 does not recognize it.

  • I cross-checked the sharpie- and the reformatting-methods. No changes to the results.

Therefore, I would think this needs to be a software issue. SD-B had worked completely fine first, there was not one problem until it stopped being recognized by the OS. Neither the pins, contacts nor the pressure on the SD card seem responsible for this issue.

Edited by Arty