897 votesVijay Bhaskar commented
This is possible but the process is not intuitive (Bad UX) hence the confusion.
You can save the offline files to what ever folder destination you what to save and use them with other apps.
First make files offline.
Then go to 'Files available offline" in "Me" section.
Then select the files you want to save and click save in the 3dot menu, you will be asked for destination folder, choose the folder and your files will be saved there.
Now you can access the offline files with other apps.