Hello there,
Just wanted to drop an idea, The default files app doesn't support files being dropped into it via drag & drop from other apps, unlike the Google files app. The feature shines with private space, AFAIK it's not possible to copy/move files between the spaces w/o 3rd-party software (Although the file picker can pick files from both if the private space is unlocked and you can use the sharing option as well, but that doesn't really cover all the cases). With this, you can drag files from one space and drop it into the other.
What do you guys think?