A data repository is a storage space for researchers to deposit data sets associated with their research. A repository can help you:
"Data should be submitted to discipline-specific, community-recognized repositories where possible. Where a suitable discipline-specific resource does not exist, data should be submitted to a generalist repository."1 The following online directories maintain lists of data sources and repositories across a wide range of disciplines.
1 Nature.Scientific Data. (n.d.). Data Repository Guidance. https://www.nature.com/sdata/policies/repositories
Check a list of Data Repositories. "Free" repositories are marked asterisk symbol (*) depending on repository size or a variety of conditions and criteria; while repositories with costs are not marked.