Google-drive – File is in owner’s trash

If you own the documents and share it with others, there is no way they will be actually able to delete the files. At the Max they will be able to remove it from their sight.

You can't zip single files, but if you download multiple files at once Google will zip all of the files.

Easiest option is to select your large file, then Ctrl+Click (Cmd+Click on Mac) on a second file, and right click either file and select "Download". Google will then take an astronomical amount of time to process the two files and eventually let you download a zip of the two files.