I use Ubuntu 20.04 on my host and Ubuntu 20.04 in the guest system and the guest addition is already installed. Shared Clipboard is enabled on my guest system. Drag and drop not.
If i copy text on the host system i can paste it on the guest system. It works fine.
But if i copy a file like a text document, i can't paste it to my guest system.
I know i can enable the drag and drop option. But why i can't copy files or folders to my guest system ? Is this not possible or is there a problem with my installation ?