This document compares several cloud storage solutions freely available to faculty, staff, and students at Johns Hopkins University. Table 1 compares the services from the perspective of collaboration, sharing, and/or syncing of data for research. This is reflected in the comparison criteria. In addition, some best practices for working with research data in an online collaborative environment are outlined. This comparison is for informational purposes only and does not constitute an endorsement by [Johns Hopkins Data Services][1]. **Cloud Services** Although there are a wide variety of cloud storage services available, four options based on popular services that are available without charge to the JHU community are compared here: [JHBox][2] (based on [Box][3]), [JHU OneDrive][4] (based on [Microsoft OneDrive][5]), [Dropbox][6], and [Google Drive][7]. The focus is on comparing attributes that affect the usability of the service for the purpose of temporarily storing and syncing personal or research files. Additionally, attributes related to conducting collaborative research are evaluated. Although Dropbox and Google Drive offer paid options with additional capabilities, only the free versions are evaluated here. The comparison is not meant to be exhaustive. However, if there is a category you would like to see compared, please contact us at dataservices@jhu.edu. Since web services evolve rapidly, the accuracy of the information is presented as-is. Therefore, it is recommended that particular attributes of interest be investigated in further detail before making a decision on which service to use. **[Cloud Services Comparison Table][8]** **[Best Practices for Cloud Services][9]** **[Cloud Storage as a Backup Solution][10]** **Additional Resources** http://www.it.johnshopkins.edu/services/collaboration_tools/ http://oithelp.nd.edu/shared-file-space/box/sync/#Sync http://www.itcs.umich.edu/storage/box/sync.php https://www.dropbox.com/en/help/42 https://support.microsoft.com/en-us/kb/2819334 http://cloudfindhq.com/blog/enterprise-content-management/google-drive/how-to-organize-google-drive-a-best-practice-guide-for-teams/ [1]: https://dataservices.jhu.edu [2]: https://it.johnshopkins.edu/services/collaboration_tools/jhbox/ [3]: https://www.box.com/home [4]: https://it.johnshopkins.edu/services/collaboration_tools/OneDrive/ [5]: https://onedrive.live.com/about/en-us/ [6]: https://www.dropbox.com/?landing=dbv2 [7]: https://www.google.com/drive/ [8]: https://osf.io/98k7g/ [9]: https://osf.io/4ac2v/ [10]: https://osf.io/tkuq8/