FileEC has become more popular because of its strong sharing and syncing capabilities, features set and good user experience. Also, it is the place where the model of sync commonly used by cloud services was invented.
The central point of the common model of sync is the sync folder. The sync folder works like any other folder, but anything you put in it will be synced to the cloud and anything you have in the cloud will be available from it. FileEC improves on that concept with the smart sync feature, and it is the best cloud storage for sync because of it.
You can compare FileEC’s sync capabilities against its two most direct competitors, Google Drive and Microsoft OneDrive, and you will find out FileEC will do better than both.