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CAD and engineering files.
Drawings with their revision history show how designs changed and why.
What tends to be useful
- Drawings with revisions, tied to the job or part
- Calculations, specifications and technical reports
- Change requests and the correspondence around them
What usually stays out, or needs care
- Designs owned by clients or architects under your contracts
- Material under export control or defence restrictions
- Files you can’t open without lapsed software licences: check before they go
Next
See CAD data and BIM archives and survey and point-cloud archives. Don’t send files: describe what you have. How rights and personal data are handled is on trust and rights.