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Data sharing should strive to be as “as open as possible, as closed as necessary.” Ask yourself: what data is necessary for verifying your findings or which data could be reused? Creating data that is easily verifiable or reusable will require some planning and preparation. It’s best to plan for data sharing and build it into your research project before you start. (A data management plan is a good way to do this.) 

Of course, you will want to make sure you have permission to share data from your project. Be sure to include data sharing in your consent forms. Check out the UK Data Service’s for data sharing. If you have an industry partner or other collaborators, you should agree on any data sharing before the project begins.

In most cases, the best place to share data is through a data repository. These are online platforms designed to hold and disseminate research data. Some are discipline specific and others take all types of data. Repositories provide several advantages over trying to share data yourself, they can:

• Rank highly in search engine results
• Provide a DOI for your data for publications and citations
• Track view/download counts
• Allow versioning
• Facilitate access requests
• Provide long-term storage of your data.

Option 1: Identify a suitable external repository

• Does your funder require or recommend a particular repository? Some funders have their own platforms or recommend certain repositories, like , , and ESRC’s
• Is there is a repository typically used in your research discipline? Public platforms like and accept all types of data. Some publishers may .

Please note: When you share your data externally, you will need to create an official University record of where the data is held.

Option 2: Use Surrey’s Open Research repository

If an external repository is not recommended, use Surrey's , which accepts a wide variety of research outputs. Please use our Research data deposit guide (PDF).

Whether you are creating a university record indicating the external location of the data or uploading your datasets in the University repository, follow the steps below:

1. Visit the 
2. On the top right corner, select Surrey Researchers sign in (use your university username and password)
3. Once logged in, select the 'add content' button (top right corner)
4. Select “asset type”. By 'asset’ the system means type of research output (for example, article, book, etc). Select ‘dataset’
   1. If you are creating a record of your dataset, go to ‘Add links to 'files' to indicate where the dataset is
   2. If you are uploading your dataset directly, drop or select the file to upload
5. Remember to add the DOI if your dataset already has one, or reserve one in the repository if your data doesn’t have a DOI
6. Please create a record of your data even in cases where the datasets cannot be shared
7. If you have specific requirements for your data or would like more guidance, contact openresearch@surrey.ac.uk.

Data can be shared anytime! Some disciplines share data almost immediately. Others tend to do it alongside a publication. Some funders suggest specific timelines for sharing data usually tied to publications, project end dates, or norms within your discipline.

Your journal may stipulate a timeframe for data sharing as a condition for publication. Surrey’s own policy (PDF) requires sharing data that underpins publication within 12 months (or sooner if required by funders).

If you don’t have a funder or your funder doesn’t specify a timeline, then follow Surrey’s policy. Exceptions to funder expectations and Surrey’s policy should be outlined and justified in the project’s data management plan.

We recommend the following best practices when sharing your data to make it easier to find and use. Of course, your data should be well organised, labelled, and accompanied by sufficient documentation. In addition:

• Create a for shared data
• Use an appropriate data repository or
• Get a DOI for your data (available from repositories as part of deposit)
• Include a data availability statement in your publications (and your data’s DOI)
  • See section below
• Apply a . Some funders recommend specific licences.

One way to gauge your data sharing practices is to ask if it’s “FAIR” or findable, accessible, interoperable, and reusable. The outline best practices for how to share data. The provide a complimentary set of people-focused best practices.

‘Open data’ encompasses a continuum of sharing practices allowing researchers the flexibility to balance transparency and appropriate protections for their data. Data repositories have a range of access controls that can be applied to sensitive data. Some data repositories can even handle very sensitive data, like the , which accepts clinical trial data. Depending on the sensitivities of your data your open data practices might include:

• Sharing a mix of openly available and restricted data
• Transforming the data to make it more shareable, e.g. de-identification or aggregation
• Restricting access and setting terms of access, e.g., only bona fide researchers
• with the same characteristics as your data
• For verification purposes only, subject to a non-disclosure agreement
• Creating a publicly discoverable metadata record outlining what data is held and why it is not accessible.

The Research Integrity and Governance Office and  can provide guidance if you are unsure.

Funders recognise that data may need to be restricted for commercial reasons. If commercial data can’t be transformed to make it more shareable, then consider making the data available only for verification purposes under a non-disclosure agreement. This meets open data expectations around transparency and verification of published findings.

If your data has commercial potential, please ensure that you have read and followed the University’s Intellectual Property Code, and contact the Technology Transfer Office (techtransferteam@surrey.ac.uk).

While not all data may be suitable for sharing immediately, any data with long-term value should be preserved. To increase the likelihood of survival and reusability, data preservation should address the following:

• Preparing your data for preservation, including:
  • Considering the cost of preserving data
  • Identifying what can be discarded
  • Good documentation and file organisation
  • If your data isn’t in widely used formats, consider transforming it into open formats.
• Finding a home for your data:
  • Data already in a data repository? They may have preservation policy
  • Surrey can accept data for long term preservation through .
• Timelines for retention:
  • Your data may be subject to statutory or funder requirements for preservation
  • Surrey requires research data be retained for a minimum of ten years.

Please note: USB sticks, external storage, personal laptops, project websites, and local hard drives are not suitable for long term preservation.

Physical data with long-term value should also be preserved. If you can’t make a digital surrogate of the physical data, then you can create a metadata record in indicating what physical objects are held and how they can be accessed.

Digital Curation Centre has a useful guide for preservation, , and Jisc’s Research Data Management Toolkit includes a . Software Sustainability Institute offers .

Data availability statements should include:

1. Terms of access (if any).

2. Persistent identifier (e.g. DOI) linking to data in a repository; or where the data can be found (e.g. a third party).

3. If the data is restricted, a statement justifying why

4. If there is no data or all the data required to verify the findings appears within the publication, then the statement can simply say that there is no data or that the data appears within the publication. 

• The data underlying this article are available in [repository name, e.g. the xxxx Repository], at , or give [URL]

• The data underlying this article were derived from sources in the public domain: [list sources, including URLs]

• This publication is supported by multiple datasets that are openly available at locations referenced in this paper.

If the data is already included in the paper:

The data underlying this article are available in the article / in the online supplementary material.

• The data underlying this article are subject to an embargo of [period of embargo of X months from the publication date of the article] to allow for commercialisation of the results. Once the embargo expires the data will be available [give details of availability, e.g. in a repository plus embargoed link; upon reasonable request, etc.]

• The data underlying this article cannot be shared publicly due to [briefly describe why the data cannot be shared, e.g. for the privacy of individuals that participated in the study] 

• The data underlying this article were provided by [third party] under licence / by permission. Data will be shared on request to the corresponding author with permission of [third party].

No data were created, collected or analysed in this study.