We have stopped supporting Drive mapping over the Internet due to the inherent problems with this approach. When network is slow or inaccessible, it can freeze your desktop; if you are saving a large file to an online drive, and if the network becomes unavailable, your application could be locked or crashes and causing loss of data.
It is also slow saving files to online drive directly. DriveHQ has since developed a much better product: DriveHQ FileManager. It also bundles DriveHQ Desktop Express, which maps a "My DriveHQ" folder in your "My Computer" folder allowing easy accessing DriveHQ storage from Windows Explorer.
For saving files directly to DriveHQ, you can open files within FileManager, and when finished editing, simply save it and the file will be sync-ed back to DriveHQ storage. You can also create a synchronized folder using FileManager; so you can save files to a local folder and FileManager can automatically sync them to DriveHQ storage.
You can also try FTP folder using DriveHQ FTP. From Internet Explorer or Windows Explorer, enter the following URL:
ftp://USERNAME:PASSWORD@ftp.drivehq.com/