The fastest way to check how much space you have left in your Dropbox is from the Account section of dropbox.com:
Personal Dropbox: Check my available storage
Dropbox Business: Check my available storage
If you've run out of space in your personal account, consider upgrading to Dropbox Plus.
Check account space on dropbox.com
- Sign in to dropbox.com.
- Click the avatar at the top of any page.
- Click Settings to access the account menu.
- The bar under your email address shows remaining Dropbox space.
- If you've paired a work and personal account, select the account you'd like to view available space for on the Settings page.
Dropbox performance may start to decline when you store more than 300,000 files.