I get an error where FolderSync will not create some folders on Dropbox?
This error is often caused when there is a mismatch in casing used in the local and remote folder name. The device folder could for example be named "myfiles" while the same folder on Dropbox is named "MyFiles".
FolderSync is case sensitive, and will in this case try to create "myfiles" folder but that is not allowed by Dropbox because it's case-insensitive and thinks the folder already exists.
To fix this you should rename the folders so their case/name matches exactly.