Add SD card to Huawei p20 lite

[asdfg]

I bought an SD card for my Huawei phone. I formatted it as required. When I try to make the SD card my default drive I get a message "you have already created a user, unable to switch to the SD card storage"
Any ideas how to get around this problem?

 

[emmt]

Have a read of this

Why can't I change my default storage location to my SD card?

I have a Huawei honor 8. It's running Android 7.0. My micro SD got corrupted a few days ago and I of course had all my photos stored on it. It was my default save location, which then switched to the internal storage when I took out the corrupted SD card. I just got a new card and put it in. I...

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