Unable to download or save photos + screen flickering issue

[AnotherElk]

@SimmoMaz

I had to backup my SD card then repurpose as portable media (it was set to be treated as internal storage).

Did you keep your SD card as external storage when changing to LineageOS, or did you incorporate it into Internal Storage again?

The card might be failing, and in case it is as a part of Internal Storage the
whole Internal Storage could be failing now.

@AnotherElk

In my point of view, choosing to incorporate an SD card into Internal Storage is handing over the integrity of the whole Internal Storage to the SD card. If the card becomes corrupt, which I think it will most probably sooner than the hardwired storage chips of the phone, with the only question being when exactly, it may take the whole Internal Storage down with it.