Light room presets don't work on Huawei p30 pro

[michaelal94110843]

I'm having an issue with importing presets into Light room on my p30 pro. the download Manager says it's downloaded to some "temparchiv" and once I clock on it it opens a folder and shows me the .Dng Files. However, once I tap on those I can't save them to my camera roll or anything. Only Print/save as PDF.
And if I close that I can't find that downloaded folder ANYWHERE. I've looked an searched through every folder on both my sd card and the internal memory. I always have to re-download it to try again. 
I tried it with different zip Apps with the same result. The last one I used, "izip",

now showes me a Symbol that Looks like the file is unzippable (see photo file "sorbet-truffle"). Can anyone help?