Hey @ruralwannabe, thanks for using Dropbox and welcome to our Community!
If you'd like to avoid syncing in general, you can unlink your account through the app's preferences and then uninstall the desktop app and access your Dropbox files only from the website. Just make sure that the app is 'up to date' and not still syncing when you do this.
Otherwise, you could use our selective sync feature which helps you save hard drive space by un-syncing folders from your computer.
I hope this helps!