OneDrive, Dropbox and Google Drive are a few of the most popular cloud storage services available. These services offer users free storage ranging from 2GB to 15GB and paid storage ranging from 100GB to a terabyte, as of August 2015. These services are available for Windows, Mac, Android and iOS devices. Additionally, OneDrive and Dropbox allow users to earn extra free storage by completing certain tasks.
OneDrive is a cloud storage service owned by Microsoft. The service directly integrates with Microsoft software such as Word and Excel and is automatically installed on Windows operating systems starting with Windows 8. Users can acquire more free storage by linking their Office 365 subscription, referring friends, backing up photos with Camera Roll or spending Bing Rewards points.
The Dropbox desktop program integrates with a computer's file system, allowing users to seamlessly upload files to the cloud. Users earn additional storage by inviting friends, completing the Get Started guide, installing Carousel on Android or iOS, installing Mailbox for iOS or linking a Facebook or Twitter account.
Google Drive is a cloud storage service easily available for users who already have a Google account. The service integrates with other Google products such as Gmail, where file attachments can be directly saved to Google Drive. The service also offers a free word processor, spreadsheet and presentation builder, allowing users to directly access and edit files from Google Drive's website.