Use a likely-perpetual cloud storage service (such as GitHub using GitHub Pages to make them accessible over the Internet) so that they do not depend on your own computer for access. You can also curate the materials and provide a web index, anything else you want For example, I am doing that at orcmid.github.io although I have active projects, such as orcmid.github.io/miser there too.
- Visit ResearchGate's official website and review their policies regarding file uploads and storage.
2. Contact ResearchGate Support
- If you're unable to upload files consider contacting ResearchGate's support team for assistance.
3. Backup Your Files
- If you plan to sell or dispose of the computer where your research files are stored, make sure to back up your important research files and data to an external storage device or a cloud-based service.
Alternatively, as Dennis Hamilton mentioned, consider the GitHub platform as a cloud storage service.