I have a HTC One M8 and I split my adopted storage with adb like this:
Microsoft Windows [Version 10.0.10586] (c) 2015 Microsoft Corporation. Alle Rechte vorbehalten. C:\Program Files (x86)\Minimal ADB and Fastboot>adb shell shell@htc_m8:/ $ sm set-force-adoptable true shell@htc_m8:/ $ sm list-disks disk:179,32 shell@htc_m8:/ $ sm partition disk:179,32 mixed 80 shell@htc_m8:/ $ sm list-disks adoptable disk:179,32
It seems to work, no error, and the phone shows the SD card as internal and external, but both as "beschädigt" - it doesn't work.
So I have to format one partition with the phone. And the result is, either the whole space of the SD card is internal or external; it depends on which part I choose to format.
Is there any help for this problem?