As of 2015, some free Dropbox services include 2 GB of storage initially, image syncing on mobile devices, file commenting and document editing from within the Dropbox website. Dropbox gives members opportunities to obtain more free storage by referring new members, connecting social media accounts and using related services, notes Dropbox.com.
Dropbox allows users to upload files to the cloud and access them free on other devices that have the app installed or have access to the Dropbox website. Designated members can comment on the files of others who share files with them, which provides a free way to collaborate. Dropbox's website allows users to open documents in Microsoft Office Online for free and easy editing, states Zapier.com. Users can also restore lost or changed files for free as part of being members of the service.