Both Drop Box and Drop Box for business utilize chunked uploading for files over 150MB
...
1. Dropbox for business is currently unable to support the character combination of: %$ in that order. If a file or path name has that combination, you will receive a "The Remote server returned an error: (400) Bad Request" error message and the file will fail to transfer.
2. Maximum file upload size of 4GB. Anything above this will result in an error, 'Content-Type' does not support multiple values. This issue will be addressed in the next version of SkySync
3. Currently the only restricted characters in Dropbox for Business are the slashes / \
4. Files that have versions in DfB and are moved to a new folder with-in DfB, when doing a transfer, will only transfer the last version before the move and any version after the move in SkySync. All other previous versions will not be transferred.
Creating a Connection
Creating a connection in Dropbox for Business requires authentication through a web browser.
...