How to Back Up to Dropbox (2026)
Dropbox can do two different jobs: sync a folder you put files into, and back up the folders your computer already uses (Desktop, Documents, Downloads). This guide covers backup — the hands-off way to protect what’s already on your machine.
1. Open Dropbox Backup Settings
- Click the Dropbox icon in your system tray (Windows) or menu bar (Mac).
- Click your avatar, then Preferences.
- Open the Backups tab and click Set up (or Manage backups).
2. Choose Which Folders to Back Up
Dropbox Backup protects your key system folders automatically:
- Tick Desktop, Documents, and/or Downloads.
- Click Set up (Mac) or Next (Windows).
- Review the summary — Dropbox shows how much space the backup needs.
Once on, these folders live in Dropbox and stay continuously updated. Changes on your computer are copied to the cloud without you doing anything.
3. Let the First Backup Finish
The initial backup can take a while depending on folder size. Leave your computer awake and online until the Dropbox icon shows it’s up to date. After that, backups run quietly in the background.
4. Backup vs Sync — Which You Want
- Backup mirrors your existing computer folders (Desktop/Documents/Downloads) to the cloud for protection. Use it so a lost or broken laptop doesn’t cost you files.
- Sync keeps a dedicated Dropbox folder identical across all your devices. Use it for files you actively move between machines or share.
Most people want both: Backup for safety, Sync for the files they work on daily.
5. Automatically Back Up Email Attachments
Computer folders are covered by Backup — but important files that arrive as email attachments never touch those folders. They sit in your inbox until you manually save them, which means they’re not backed up anywhere.
Carly handles that: it watches Gmail or Outlook and saves attachments straight into Dropbox as they arrive, so contracts and receipts are protected the moment they land instead of waiting on a manual download. Carly starts at $35/month and runs continuously, so nothing important slips through.
6. Troubleshooting
My backup is stuck or very slow
Large Downloads folders and antivirus scanning can stall the first backup. Keep the computer awake, pause other heavy uploads, and let it complete once before judging speed.
I don’t see the Backups tab
Update the Dropbox desktop app to the latest version — older releases predate Backup. Backup also requires the desktop app, not just the website.
Backup turned my Desktop into a Dropbox folder
That’s expected — Backup relocates the folder into Dropbox so it can protect it. Your files stay exactly where you access them; they’re just mirrored to the cloud now.
Related Dropbox guides: How to organize Dropbox · How to automate Dropbox · How to free up space · How to recover deleted files. To back up email attachments to Dropbox automatically, see Carly’s Dropbox integration.
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