I have to send in a chromebook.  The owner has bookmarks, apps and some files on the thing.  Last time I tried to save bookmarks etc on one of these it didn't work.

The bookmarks they had pointed to files they had saved so they could access them when there was no Internet.  I saved the bookmarks and the files on a USB drive.  When the computer came back I put the files back and the bookmarks.  However the bookmarks no longer worked to open those files.

I've looked on the Internet and it's been less than helpful.  They backup a basic chromebook with no files and no bookmarks related to files on the thing.

I'd like to just image it like a real computer so that when it comes back could restore it.