Of course you can. I put my projects directly into Dropbox from Scrivener so I'm always backedup to cloud. 
You're not alone. I backup Scrivener on my computer using Time Machine, as well as to Dropbox, and on an external hard drive. Once it's all setup it's done automatically so it's not as tedious as it sounds.Michael W Griffith said:Maybe I'm overly paranoid, but I keep a copy on my laptop, another on Dropbox, and another on Box.com. I name the file "title 0510 2015," and while it sounds cumbersome, takes less than thirty seconds to complete. Once a week I put another copy on an external hard drive. I can't imagine how upsetting it would be to lose months of work, so it's worth it to me to do everything possible to take that possibility off the table.
Not quite.Donna White Glaser said:All of the devices that you're using w/ Dropbox & Scrivener need to have Scrivener installed on them though.
Follow SpringfieldMH's adviceSpringfieldMH said:For background info and considerations, see the knowledgebase article
https://scrivener.tenderapp.com/help/kb/cloud-syncing/using-scrivener-with-cloud-sync-services