With Google Drive, you can :

• Create and collaborate. In Google Drive, you can create new documents, spreadsheets and presentations instantly. Work together at the same time, on the same doc, and see changes as they appear.
• Store everything safely and access it anywhere (especially while on the go). All your stuff is just… there. You can access your stuff from anywhere – on the web, in your home, at the office, while running errands and from all of your devices (Mac, PC, Android phones/tablets and iOS devices soon).
• Search everything. Search by keyword and filter by file type, owner, activity and many more. Drive can even recognize text in scanned documents using Optical Character Recognition (OCR) technology.

We know you rely on your files to get work done every day. Drive uses the same infrastructure as other Google Apps services, meaning it also has the same admin tools, security and reliability, including :

• Centralized management : New tools available in the Apps control panel for administrators to add or remove storage for individuals or teams of users.
• Security : Encryption on data transfer between your browser and Google servers, and optional 2-step verification that prevents unauthorized account access by having users sign in with a secure code from their mobile phone.
• Data Replication : Simultaneous data replication in multiple data centers, so that in the unlikely event that one data center is unavailable, your files will still be safe and accessible.
• Uptime : 99.9% uptime guarantee so you can be confident that your files will be available whenever you need them.

Each Apps user gets 5GB of storage included and administrators can centrally purchase and manage more. When a user reaches their limit, administrators on Google Apps for Business accounts can buy storage as it’s needed.

Source: http://googleenterprise.blogspot.pt/2012/04/introducing-google-drive-newest-member.html