Sync uses local networks when available, and cuts out needless round trips through servers in the cloud.
Instead of moving an entire file every time it is updated, Sync incrementally updates only the pieces of a file that have changed.
10 GB? 100 GB? No problem. Easily move massive multi-terabyte folders.
Putting all of your stuff in the cloud is impractical. Sync shares everything from existing folders without uploading huge files to the cloud.
Your files and personal identity are only stored locally on the devices you authorize, never in the cloud. Your identity can never be correlated to the data you share with Sync.
Cloud services are attractive to hackers because user account information is centralized. Sync uses distributed cryptographic security so there is no central target for attacks.
