Do you want to test this code? You can flash it directly from Betaflight Configurator:

• Simply put #14018 (this pull request number) in the Select commit field of the Configurator firmware flasher tab (you need to Enable expert mode, Show release candidates and Development).

WARNING: It may be unstable. Use only for testing!

See #14070. Rebase after that is merged.

Now #14070 fixed SDC for AT32 it is shown in either setting (flash / sdc)

• only one blackbox device can be active at the time - will this restrict having both FLASH and SDCARD (so we can switch between) ?

You’ll need to build with USE_FLASH or USE_SD_CARD

Okay, but ORBITF435 has both options available

Hi @haslinghuis, @SteveCEvans
I applied your code changes in this PR and built it with both USE_FLASH and USE_SD_CARD defined in the configuration. This allowed me to select either the SD card or Flash as the blackbox. However, I noticed that when the blackbox is set to the SD card and I switch to MSC mode, the computer doesn't recognize the SD card. On the other hand, it works fine in Flash mode.

Guess this needs a rebase to include #14070

@SteveCEvans please rebase

Rebase done, but still needs work.

Now working and reporting both FLASH and SD card capacity and either can be selected.

With Onboard Flash selected that Blackbox tab displays the available capacity for both the onboard flash and the SD, but shows the capacity of the SD card in the page header. I think it should report the flash capacity in this case. Anyway the ORBITF435 is now working.

backport to 4.5.x needed?

backport to 4.5.x needed?

@haslinghuis please let @SteveCEvans do the back porting