Files uploaded through the desktop app or mobile apps must be 2 TB or smaller.
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Files uploaded to dropbox.com must be 50 GB or smaller.
All files uploaded to your Dropbox must be smaller than your storage space. For example, if your account has a storage quota of 2 GB, you can upload one 2 GB file or many files that add up to 2 GB. If you are over your storage quota, Dropbox will stop syncing.
Note: Files uploaded through the API must be 350GB or smaller.