ExpanDrive 3 development build 3003 is now available with support for Amazon S3 multi-part uploads. This enables much smoother and faster uploads along with the ability to upload keys larger than 5GB. We have also introduced a new connection layer to S3 which pools and re-uses connections to Amazon, drastically reducing latency while browsing around and interacting with the drive.
Additionally, SFTP users on Mac should see a massive throughput increase when on a high speed/LAN connection, 2-3x on average. Windows support for these SFTP improvements will be available in the next build.