Sync offers 5 GB for free.
Features of the Sync:
Apps and devices
- Send links to files and folders
- Recipients of links do not need a Sync account
- Password protection
Collaboration
- Create shared folders
- Invite anyone to shared folders
Backup and restore
- Sync or restore to any computer
- Realtime backup
- Selectively sync folders
- Deleted file recovery (30-day)
- File version history (30-day)
Support
- Help guides and knowledge base
Source: Sync