This is the simplest method. No real-time syncing—just scheduled backups.

If Adobe’s official downloader doesn't show it, sites like ProDesignTools

Lightroom CC 2015 may become slow if your internet connection is unstable while accessing “online only” files. Always sync before editing.

This method keeps your original raw files on Google Drive and only brings them locally when editing.

Safe, simple, no configuration risks. Cons: Manual only; no automatic incremental backup after each edit.