Zotero Desktop App - Not syncing then unlinked account and lost all my data and files
I lost all my files when unlinking my account i can't find anything on my laptop or app where are all my files in zotero as it was all organised and was not syncing for the past couple of months as i had sync issues
Better answer below
You can set up syncing again to download whatever data is in your online library. You do appear to have been syncing until at least a few weeks ago, but you're at your file storage quota, so all your attachment files won't have been uploaded.
Beyond that, your only option would be to restore from a backup you made of your Zotero data directory .