[ngrant]

Yes you can now select folders from your PC and external devices with "Backup and Sync". I have been using Drive (100GB plan) as a replacement for Dropbox for several years now and it meets all my backup and cloud storage needs. Private information I keep out of the cloud on local storage only.

On the matter of the Google credits, I do receive emails from time to time offering credits, but they are mostly useless to me. Books, Movies, Apps - I have never found anything of interest to buy. The only times I have wanted to purchase Apps such as SmartAudio and Moon Reader Pro there weren't any credits at that time -- and let's face it, Apps are pretty inexpensive at mostly <$4! And I lead a very sheltered life, having <20 apps on my phone and Chromebook - and that includes the pre-installed ones that can't be uninstalled.

HOW DOES BACKUP AND SYNC APP WORK

Spoiler:

As the name suggests, the app offers two functionalities — backup and sync. In the former case, the app lets you create a backup of your entire computer or the selected folders on Google Drive. You can also backup files from a USB drive or SD card.

The term backup is misleading here for the folders are constantly synced as well. Meaning, any change you make to the synced files on your computer or Google Drive will reflect on the other side too.

When it comes to sync, you can sync all your Google Drive folders or selected folders to your computer. That lets you access your Drive content on your PC even when you're offline.

Originally Posted by Apache

If I remember correctly that is the one thing I did not like about Google Drive. You could not just specify which folders and files to automatically upload. They had a folder on C:\ that you had to use for uploading. I remember it was very unwieldy and almost impossible to use if you had multiple HDs on your PC.
Apache