MSC broken for H743 - 8.0.1

[b14ckyy]

Current Behavior

MSC Mode does not show a drive when activated on H743 MCUs. Tested and confirmed with MATEK H743 and AET H743-Wing. F405, AT32 and F765 not affected and work normal. Only 8.0.1 shows the issue. MSC in 8.0.0 works fine with same config.

Steps to Reproduce

1. Make sure MSC works in 8.0.0
2. Update to 8.0.1 on H743
3. Enter MSC mode

Nothing happens

Expected behavior

MSC mode working

Suggested solution(s)

Maybe a change in this PR caused it? #10706

Additional context

Device Manager shows Virtual COM Port in FS Mode but with missing drivers - Code 28? But that makes not much sense since the drivers are there in 8.0.0.

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INAV/MATEKH743 8.0.1 Mar 28 2025 / 09:55:33 (ae47bcb)
GCC-13.2.1 20231009

[jasc76]

Holybro Kakute H743 also affected

[babayaga4365]

My GEPRC TAKER H743 also get affected. Worse, I can't even use MSC in 8.0.0

[b14ckyy]

@babayaga4365 Can you please open a new ticket for that specific FC with all the necessary information?
The here mentioned issue only affects the SD driver. If On Board Flash does not work and its also happening in 8.0.0, then its most likely a different issue/root cause.

[babayaga4365]

@b14ckyy Actually, the vendor configured the onboard flash as SD card, not flash storage so technically, the FC use the SD card driver
Spec is GEPRC TAKER H743BT using MPU6000 Gyro that can connect to Speedybee app