A Data Repository is a collection of datasets that have been deposited for storage and discoverability. They are often discipline specific or affiliated with a research institution. Examples include ICPSR and Harvard Dataverse Network.
Is it one that your researcher community uses?
Can you restrict access to data if necessary? (ie. it is proprietary)
Can the data be cited and found in a unique and persistent way (e.g. with a DOI?)
Does the repository commit to preservation actions that will preserve the integrity of your research data?
How long will your data be retained in the repository?
What happens at the end of the data retention period?
Is there support provided for data documentation and/or data deposit?
Are your rights as data depositor clear?
Are there costs associated with having your data deposited in this repository?