Proprietary file formats require specific software provided by one vendor to use. While some data files may need to be in proprietary formats, non-proprietary or open formats are freely available for anyone to use, and easier to digitally preserve in the long term.1
Resources for sustainable file formats:
1. Hu and Barsky. 2022. File Formats Guide. UBC Library. https://osf.io/ena5p
Credit for this Borealis Data Repository Guide goes to Thompson Rivers University. Gratefully reused with permission.