The regular Android steps doesn't work? "Settings>Apps>APP>Storage>Change/Move to Memory Card" doesn't show.
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I would preferably keep it as Portable Storage and not adopted/formatted as Internal Storage only that's locked to the device.
How do I configure Huawei nano memory card to my liking?
Such as moving Photos and Videos to Memory Card as default, plus still backs up to Google;
and certain Apps moved to Memory Card and/or future App downloads&installs.

How to Move Android Apps to an SD Card
If your Android phone comes with a small amount of internal storage, here’s how to move apps to a microSD card and free up more space.

How to move apps from internal memory to SD card?
Hi, I am using P30 Lite, new to Huawei phone system. How to move apps from internal memory to SD card? Check all apps, no option to move..
I would preferably keep it as Portable Storage and not adopted/formatted as Internal Storage only that's locked to the device.
How do I configure Huawei nano memory card to my liking?
Such as moving Photos and Videos to Memory Card as default, plus still backs up to Google;
and certain Apps moved to Memory Card and/or future App downloads&installs.