On dropbox.com
Files and folders uploaded online through dropbox.com can be up to 350 GB each. However, if you’re uploading large files (>50 GB) on dropbox.com, make sure you have a fast and reliable internet connection.
On the Dropbox desktop app
Files and folders uploaded on the Dropbox desktop app can be up to 2 TB each.
On the Dropbox mobile app
Files and folders uploaded on the Dropbox mobile app can be up to 2 TB each.
Learn more about adding files and folders to your Dropbox account.