Document Carry over between versions

I went to open up a document from someone else and it said I needed the latest 2026 version. Turns out I had both the 2025 version and the newest 2026 version installed. Problem is, none of my data from the 2025 version carried over to the 2026 version. Only cloud documents show up but all of the files from my computer are not automatically there. Im new to indesign and usually all of my files carry over from update to update. How can I sync everything?