Hi @jeanbrochefort,
It sounds like maybe you were using the “sync to odrive” feature during the Premium trial and then the trial ended. This shouldn’t normally perform any unsycing, but you may have also had auto-unsync in place during the trial, too.
You should still be able to find those file via the default odrive folder (select “open odrive folder” from the odrive menu), in the location you chose to sync to.
For more information on the difference between free sync features and Premium sync features, please take a look at this post: